31400421438 has 16 divisors (see below), whose sum is σ = 66495010320. Its totient is φ = 9851112576.

The previous prime is 31400421433. The next prime is 31400421457. The reversal of 31400421438 is 83412400413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400421433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153923533 + ... + 153923736.

It is an arithmetic number, because the mean of its divisors is an integer number (4155938145).

Almost surely, 2^31400421438 is an apocalyptic number.

31400421438 is an abundant number, since it is smaller than the sum of its proper divisors (35094588882).

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

31400421438 is a wasteful number, since it uses less digits than its factorization.

31400421438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307847291.

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 31400421438 in words is "thirty-one billion, four hundred million, four hundred twenty-one thousand, four hundred thirty-eight".