3978031900 has 36 divisors (see below), whose sum is σ = 9086666680. Its totient is φ = 1507464000.

The previous prime is 3978031891. The next prime is 3978031927. The reversal of 3978031900 is 91308793.

It is a super-2 number, since 2×3978031900² = 31649475594835220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1044951 + ... + 1048750.

Almost surely, 2^3978031900 is an apocalyptic number.

It is an amenable number.

3978031900 is an abundant number, since it is smaller than the sum of its proper divisors (5108634780).

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

3978031900 is a wasteful number, since it uses less digits than its factorization.

3978031900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093734 (or 2093727 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 3978031900 is about 63071.6410124233. The cubic root of 3978031900 is about 1584.4897002860.

The spelling of 3978031900 in words is "three billion, nine hundred seventy-eight million, thirty-one thousand, nine hundred".