31004138 has 32 divisors (see below), whose sum is σ = 53747712. Its totient is φ = 13274800.

The previous prime is 31004119. The next prime is 31004147. The reversal of 31004138 is 83140013.

It is a happy number.

It is a super-2 number, since 2×31004138² = 1922513146246088, which contains 22 as substring.

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, 35495 + ... + 36357.

It is an arithmetic number, because the mean of its divisors is an integer number (1679616).

Almost surely, 2^31004138 is an apocalyptic number.

31004138 is a deficient number, since it is larger than the sum of its proper divisors (22743574).

31004138 is a wasteful number, since it uses less digits than its factorization.

31004138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 31004138 is about 5568.1359538000. The cubic root of 31004138 is about 314.1520420723.

The spelling of 31004138 in words is "thirty-one million, four thousand, one hundred thirty-eight".