31400265380 has 24 divisors (see below), whose sum is σ = 71935153920. Its totient is φ = 11418278240.

The previous prime is 31400265373. The next prime is 31400265401. The reversal of 31400265380 is 8356200413.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 71364020 + ... + 71364459.

It is an arithmetic number, because the mean of its divisors is an integer number (2997298080).

Almost surely, 2^31400265380 is an apocalyptic number.

It is an amenable number.

31400265380 is an abundant number, since it is smaller than the sum of its proper divisors (40534888540).

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

31400265380 is a wasteful number, since it uses less digits than its factorization.

31400265380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142728499 (or 142728497 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 31400265380 its reverse (8356200413), we get a palindrome (39756465793).

The spelling of 31400265380 in words is "thirty-one billion, four hundred million, two hundred sixty-five thousand, three hundred eighty".