31489490 has 32 divisors (see below), whose sum is σ = 58973184. Its totient is φ = 12093120.

The previous prime is 31489489. The next prime is 31489519. The reversal of 31489490 is 9498413.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48347 + ... + 48993.

It is an arithmetic number, because the mean of its divisors is an integer number (1842912).

Almost surely, 2^31489490 is an apocalyptic number.

31489490 is a deficient number, since it is larger than the sum of its proper divisors (27483694).

31489490 is a wasteful number, since it uses less digits than its factorization.

31489490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 31489490 is about 5611.5496968306. The cubic root of 31489490 is about 315.7828516691.

The spelling of 31489490 in words is "thirty-one million, four hundred eighty-nine thousand, four hundred ninety".