3645985924 has 81 divisors (see below), whose sum is σ = 7868047383. Its totient is φ = 1473803856.

The previous prime is 3645985907. The next prime is 3645985927. The reversal of 3645985924 is 4295895463.

The square root of 3645985924 is 60382.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×3645985924² = 26586426716012267552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3645985927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16061499 + ... + 16061725.

Almost surely, 2^3645985924 is an apocalyptic number.

3645985924 is the 60382-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3645985924

3645985924 is an abundant number, since it is smaller than the sum of its proper divisors (4222061459).

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

3645985924 is a wasteful number, since it uses less digits than its factorization.

3645985924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 255 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 55.

The cubic root of 3645985924 is about 1539.1170972224.

The spelling of 3645985924 in words is "three billion, six hundred forty-five million, nine hundred eighty-five thousand, nine hundred twenty-four".