31912434 has 32 divisors (see below), whose sum is σ = 75090240. Its totient is φ = 10011456.

The previous prime is 31912411. The next prime is 31912481. The reversal of 31912434 is 43421913.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31912398 and 31912407.

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, 16464 + ... + 18299.

It is an arithmetic number, because the mean of its divisors is an integer number (2346570).

Almost surely, 2^31912434 is an apocalyptic number.

31912434 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31912434 is an abundant number, since it is smaller than the sum of its proper divisors (43177806).

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

31912434 is a wasteful number, since it uses less digits than its factorization.

31912434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34791 (or 34785 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 31912434 is about 5649.1091333059. The cubic root of 31912434 is about 317.1903575935.

It can be divided in two parts, 3191 and 2434, that added together give a square (5625 = 75²).

The spelling of 31912434 in words is "thirty-one million, nine hundred twelve thousand, four hundred thirty-four".