31438954792 has 64 divisors (see below), whose sum is σ = 70259696640. Its totient is φ = 12904704000.

The previous prime is 31438954741. The next prime is 31438954793. The reversal of 31438954792 is 29745983413.

It is not an unprimeable number, because it can be changed into a prime (31438954793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75042 + ... + 261742.

It is an arithmetic number, because the mean of its divisors is an integer number (1097807760).

Almost surely, 2^31438954792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31438954792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35129848320).

31438954792 is an abundant number, since it is smaller than the sum of its proper divisors (38820741848).

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

31438954792 is a wasteful number, since it uses less digits than its factorization.

31438954792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186842 (or 186838 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 31438954792 in words is "thirty-one billion, four hundred thirty-eight million, nine hundred fifty-four thousand, seven hundred ninety-two".