31004424 has 64 divisors (see below), whose sum is σ = 93960000. Its totient is φ = 9394560.

The previous prime is 31004423. The next prime is 31004431. The reversal of 31004424 is 42440013.

It is a super-2 number, since 2×31004424² = 1922548615143552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31004397 and 31004406.

It is not an unprimeable number, because it can be changed into a prime (31004423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4149 + ... + 8900.

It is an arithmetic number, because the mean of its divisors is an integer number (1468125).

Almost surely, 2^31004424 is an apocalyptic number.

It is an amenable number.

31004424 is an abundant number, since it is smaller than the sum of its proper divisors (62955576).

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

31004424 is a wasteful number, since it uses less digits than its factorization.

31004424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13075 (or 13065 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 31004424 is about 5568.1616355849. The cubic root of 31004424 is about 314.1530080423.

Adding to 31004424 its reverse (42440013), we get a palindrome (73444437).

The spelling of 31004424 in words is "thirty-one million, four thousand, four hundred twenty-four".