31479490 has 32 divisors (see below), whose sum is σ = 65286144. Its totient is φ = 10704960.

The previous prime is 31479467. The next prime is 31479491. The reversal of 31479490 is 9497413.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (31479491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7120 + ... + 10660.

It is an arithmetic number, because the mean of its divisors is an integer number (2040192).

Almost surely, 2^31479490 is an apocalyptic number.

31479490 is an abundant number, since it is smaller than the sum of its proper divisors (33806654).

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

31479490 is a wasteful number, since it uses less digits than its factorization.

31479490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 31479490 is about 5610.6586066165. The cubic root of 31479490 is about 315.7494208022.

The spelling of 31479490 in words is "thirty-one million, four hundred seventy-nine thousand, four hundred ninety".