31409916 has 24 divisors (see below), whose sum is σ = 73476480. Its totient is φ = 10443312.

The previous prime is 31409857. The next prime is 31409921. The reversal of 31409916 is 61990413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1905 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (3061520).

Almost surely, 2^31409916 is an apocalyptic number.

It is an amenable number.

31409916 is an abundant number, since it is smaller than the sum of its proper divisors (42066564).

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

31409916 is a wasteful number, since it uses less digits than its factorization.

31409916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673 (or 6671 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 31409916 is about 5604.4550136476. The cubic root of 31409916 is about 315.5166326792.

The spelling of 31409916 in words is "thirty-one million, four hundred nine thousand, nine hundred sixteen".