31022040 has 64 divisors (see below), whose sum is σ = 106364160. Its totient is φ = 7090560.

The previous prime is 31022039. The next prime is 31022081. The reversal of 31022040 is 4022013.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 17626 + ... + 19305.

It is an arithmetic number, because the mean of its divisors is an integer number (1661940).

Almost surely, 2^31022040 is an apocalyptic number.

31022040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31022040 is an abundant number, since it is smaller than the sum of its proper divisors (75342120).

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

31022040 is a wasteful number, since it uses less digits than its factorization.

31022040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36952 (or 36948 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 31022040 is about 5569.7432615876. The cubic root of 31022040 is about 314.2124949465.

Adding to 31022040 its reverse (4022013), we get a palindrome (35044053).

The spelling of 31022040 in words is "thirty-one million, twenty-two thousand, forty".