3721814640 has 60 divisors (see below), whose sum is σ = 12499096584. Its totient is φ = 992483712.

The previous prime is 3721814623. The next prime is 3721814651. The reversal of 3721814640 is 464181273.

3721814640 is a `hidden beast` number, since 3 + 7 + 2 + 1 + 8 + 1 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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 = 3721814595 and 3721814604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2583874 + ... + 2585313.

Almost surely, 2^3721814640 is an apocalyptic number.

3721814640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3721814640 is an abundant number, since it is smaller than the sum of its proper divisors (8777281944).

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

3721814640 is a wasteful number, since it uses less digits than its factorization.

3721814640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5169206 (or 5169197 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 3721814640 is about 61006.6770116190. The cubic root of 3721814640 is about 1549.7140839258.

The spelling of 3721814640 in words is "three billion, seven hundred twenty-one million, eight hundred fourteen thousand, six hundred forty".