31439300032 has 42 divisors (see below), whose sum is σ = 72573059832. Its totient is φ = 13473984384.

The previous prime is 31439300027. The next prime is 31439300033. The reversal of 31439300032 is 23000393413.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31439300033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5009508 + ... + 5015779.

It is an arithmetic number, because the mean of its divisors is an integer number (1727929996).

Almost surely, 2^31439300032 is an apocalyptic number.

31439300032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31439300032 is an abundant number, since it is smaller than the sum of its proper divisors (41133759800).

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

31439300032 is a wasteful number, since it uses less digits than its factorization.

31439300032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025313 (or 10025296 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31439300032 its reverse (23000393413), we get a palindrome (54439693445).

The spelling of 31439300032 in words is "thirty-one billion, four hundred thirty-nine million, three hundred thousand, thirty-two".