31040022440 has 64 divisors (see below), whose sum is σ = 79843484160. Its totient is φ = 10638789120.

The previous prime is 31040022427. The next prime is 31040022523. The reversal of 31040022440 is 4422004013.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919460 + ... + 952620.

It is an arithmetic number, because the mean of its divisors is an integer number (1247554440).

Almost surely, 2^31040022440 is an apocalyptic number.

It is an amenable number.

31040022440 is an abundant number, since it is smaller than the sum of its proper divisors (48803461720).

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

31040022440 is a wasteful number, since it uses less digits than its factorization.

31040022440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36522 (or 36518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 31040022440 its reverse (4422004013), we get a palindrome (35462026453).

The spelling of 31040022440 in words is "thirty-one billion, forty million, twenty-two thousand, four hundred forty".