3694517820 has 144 divisors (see below), whose sum is σ = 12850725888. Its totient is φ = 841622400.

The previous prime is 3694517789. The next prime is 3694517837. The reversal of 3694517820 is 287154963.

3694517820 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

3694517820 is a nontrivial binomial coefficient, being equal to C(85960, 2).

It is a Harshad number since it is a multiple of its sum of digits (45).

3694517820 is strictly pandigital in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 382045 + ... + 391595.

It is an arithmetic number, because the mean of its divisors is an integer number (89241152).

It is a 1-persistent number, because it is pandigital, but 2⋅3694517820 = 7389035640 is not.

Almost surely, 2^3694517820 is an apocalyptic number.

3694517820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3694517820 is the 85959-th triangular number and also the 42980-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3694517820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6425362944).

3694517820 is an abundant number, since it is smaller than the sum of its proper divisors (9156208068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3694517820 is a wasteful number, since it uses less digits than its factorization.

3694517820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9880 (or 9875 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 3694517820 is about 60782.5453563768. The cubic root of 3694517820 is about 1545.9161060743.

The spelling of 3694517820 in words is "three billion, six hundred ninety-four million, five hundred seventeen thousand, eight hundred twenty".