3721818240 has 512 divisors, whose sum is σ = 15598656000. Its totient is φ = 820592640.

The previous prime is 3721818167. The next prime is 3721818251. The reversal of 3721818240 is 428181273.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3721818195 and 3721818204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3507310 + ... + 3508370.

It is an arithmetic number, because the mean of its divisors is an integer number (30466125).

Almost surely, 2^3721818240 is an apocalyptic number.

3721818240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3721818240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7799328000).

3721818240 is an abundant number, since it is smaller than the sum of its proper divisors (11876837760).

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

3721818240 is a wasteful number, since it uses less digits than its factorization.

3721818240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 3721818240 is about 61006.7065165790. The cubic root of 3721818240 is about 1549.7145835897.

The spelling of 3721818240 in words is "three billion, seven hundred twenty-one million, eight hundred eighteen thousand, two hundred forty".