31439390896 has 20 divisors (see below), whose sum is σ = 64119811000. Its totient is φ = 14892342912.

The previous prime is 31439390891. The next prime is 31439390921. The reversal of 31439390896 is 69809393413.

It is a super-4 number, since 4×31439390896⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (31439390891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51709221 + ... + 51709828.

It is an arithmetic number, because the mean of its divisors is an integer number (3205990550).

Almost surely, 2^31439390896 is an apocalyptic number.

It is an amenable number.

31439390896 is an abundant number, since it is smaller than the sum of its proper divisors (32680420104).

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

31439390896 is a wasteful number, since it uses less digits than its factorization.

31439390896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103419076 (or 103419070 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 55.

The spelling of 31439390896 in words is "thirty-one billion, four hundred thirty-nine million, three hundred ninety thousand, eight hundred ninety-six".