31489616 has 20 divisors (see below), whose sum is σ = 61454400. Its totient is φ = 15630432.

The previous prime is 31489613. The next prime is 31489651. The reversal of 31489616 is 61698413.

It is a self number, because there is not a number n which added to its sum of digits gives 31489616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31489613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856 + ... + 9303.

It is an arithmetic number, because the mean of its divisors is an integer number (3072720).

Almost surely, 2^31489616 is an apocalyptic number.

It is an amenable number.

31489616 is a deficient number, since it is larger than the sum of its proper divisors (29964784).

31489616 is a wasteful number, since it uses less digits than its factorization.

31489616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14306 (or 14300 counting only the distinct ones).

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

The square root of 31489616 is about 5611.5609236646. The cubic root of 31489616 is about 315.7832728529.

The spelling of 31489616 in words is "thirty-one million, four hundred eighty-nine thousand, six hundred sixteen".