31799407 has 12 divisors (see below), whose sum is σ = 34152840. Its totient is φ = 29595312.

The previous prime is 31799389. The next prime is 31799419. The reversal of 31799407 is 70499713.

It is not a de Polignac number, because 31799407 - 2¹⁵ = 31766639 is a prime.

It is a super-2 number, since 2×31799407² = 2022404571103298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31799407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31799497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20553 + ... + 22045.

It is an arithmetic number, because the mean of its divisors is an integer number (2846070).

Almost surely, 2^31799407 is an apocalyptic number.

31799407 is a deficient number, since it is larger than the sum of its proper divisors (2353433).

31799407 is a wasteful number, since it uses less digits than its factorization.

31799407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 31799407 is about 5639.0962928469. The cubic root of 31799407 is about 316.8154412038.

The spelling of 31799407 in words is "thirty-one million, seven hundred ninety-nine thousand, four hundred seven".