3925557972 has 144 divisors (see below), whose sum is σ = 12247704000. Its totient is φ = 1082870208.

The previous prime is 3925557971. The next prime is 3925558139. The reversal of 3925557972 is 2797555293.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3925557971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140679 + ... + 166257.

It is an arithmetic number, because the mean of its divisors is an integer number (85053500).

Almost surely, 2^3925557972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3925557972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6123852000).

3925557972 is an abundant number, since it is smaller than the sum of its proper divisors (8322146028).

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

3925557972 is a wasteful number, since it uses less digits than its factorization.

3925557972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25635 (or 25620 counting only the distinct ones).

The product of its digits is 5953500, while the sum is 54.

The square root of 3925557972 is about 62654.2733738091. The cubic root of 3925557972 is about 1577.4918776325.

The spelling of 3925557972 in words is "three billion, nine hundred twenty-five million, five hundred fifty-seven thousand, nine hundred seventy-two".