31004120 has 32 divisors (see below), whose sum is σ = 79725600. Its totient is φ = 10629888.

The previous prime is 31004119. The next prime is 31004147. The reversal of 31004120 is 2140013.

It is a happy number.

It is a super-2 number, since 2×31004120² = 1922510913948800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55085 + ... + 55644.

It is an arithmetic number, because the mean of its divisors is an integer number (2491425).

Almost surely, 2^31004120 is an apocalyptic number.

It is an amenable number.

31004120 is an abundant number, since it is smaller than the sum of its proper divisors (48721480).

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

31004120 is a wasteful number, since it uses less digits than its factorization.

31004120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110747 (or 110743 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 31004120 is about 5568.1343374599. The cubic root of 31004120 is about 314.1519812767.

Adding to 31004120 its reverse (2140013), we get a palindrome (33144133).

The spelling of 31004120 in words is "thirty-one million, four thousand, one hundred twenty".