31004090 has 32 divisors (see below), whose sum is σ = 63640080. Its totient is φ = 10773504.

The previous prime is 31004047. The next prime is 31004093. The reversal of 31004090 is 9040013.

It can be written as a sum of positive squares in 8 ways, for example, as 3682561 + 27321529 = 1919^2 + 5227^2 .

It is a super-2 number, since 2×31004090² = 1922507193456200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (31004093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4805 + ... + 9224.

Almost surely, 2^31004090 is an apocalyptic number.

31004090 is an abundant number, since it is smaller than the sum of its proper divisors (32635990).

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

31004090 is a wasteful number, since it uses less digits than its factorization.

31004090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14066.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 31004090 is about 5568.1316435587. The cubic root of 31004090 is about 314.1518799508.

The spelling of 31004090 in words is "thirty-one million, four thousand, ninety".