3939991400 has 48 divisors (see below), whose sum is σ = 9699340140. Its totient is φ = 1483289600.

The previous prime is 3939991387. The next prime is 3939991409. The reversal of 3939991400 is 41999393.

It can be written as a sum of positive squares in 6 ways, for example, as 2731316644 + 1208674756 = 52262^2 + 34766^2 .

It is not an unprimeable number, because it can be changed into a prime (3939991409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 576011 + ... + 582810.

Almost surely, 2^3939991400 is an apocalyptic number.

It is an amenable number.

3939991400 is an abundant number, since it is smaller than the sum of its proper divisors (5759348740).

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

3939991400 is a wasteful number, since it uses less digits than its factorization.

3939991400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158854 (or 1158845 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 3939991400 is about 62769.3508011673. The cubic root of 3939991400 is about 1579.4228784709.

The spelling of 3939991400 in words is "three billion, nine hundred thirty-nine million, nine hundred ninety-one thousand, four hundred".