3987207928 has 16 divisors (see below), whose sum is σ = 8155652760. Its totient is φ = 1812367200.

The previous prime is 3987207907. The next prime is 3987207929. The reversal of 3987207928 is 8297027893.

It is a super-2 number, since 2×3987207928² = 31795654122212106368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987207929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22654503 + ... + 22654678.

Almost surely, 2^3987207928 is an apocalyptic number.

It is an amenable number.

3987207928 is an abundant number, since it is smaller than the sum of its proper divisors (4168444832).

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

3987207928 is a wasteful number, since it uses less digits than its factorization.

3987207928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45309198 (or 45309194 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 3987207928 is about 63144.3420109831. The cubic root of 3987207928 is about 1585.7070658376.

The spelling of 3987207928 in words is "three billion, nine hundred eighty-seven million, two hundred seven thousand, nine hundred twenty-eight".