31020029988 has 24 divisors (see below), whose sum is σ = 75527030208. Its totient is φ = 9890444256.

The previous prime is 31020029987. The next prime is 31020030073. The reversal of 31020029988 is 88992002013.

It is not an unprimeable number, because it can be changed into a prime (31020029981) 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, 56195431 + ... + 56195982.

It is an arithmetic number, because the mean of its divisors is an integer number (3146959592).

Almost surely, 2^31020029988 is an apocalyptic number.

It is an amenable number.

31020029988 is an abundant number, since it is smaller than the sum of its proper divisors (44507000220).

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

31020029988 is a wasteful number, since it uses less digits than its factorization.

31020029988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112391443 (or 112391441 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 31020029988 in words is "thirty-one billion, twenty million, twenty-nine thousand, nine hundred eighty-eight".