31479040 has 36 divisors (see below), whose sum is σ = 75405204. Its totient is φ = 12591104.

The previous prime is 31479031. The next prime is 31479061. The reversal of 31479040 is 4097413.

It can be written as a sum of positive squares in 2 ways, for example, as 6718464 + 24760576 = 2592^2 + 4976^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11017 + ... + 13576.

It is an arithmetic number, because the mean of its divisors is an integer number (2094589).

Almost surely, 2^31479040 is an apocalyptic number.

It is an amenable number.

31479040 is an abundant number, since it is smaller than the sum of its proper divisors (43926164).

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

31479040 is an equidigital number, since it uses as much as digits as its factorization.

31479040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24614 (or 24600 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 31479040 is about 5610.6185042293. The cubic root of 31479040 is about 315.7479162467.

The spelling of 31479040 in words is "thirty-one million, four hundred seventy-nine thousand, forty".