31496816 has 40 divisors (see below), whose sum is σ = 66193680. Its totient is φ = 14432256.

The previous prime is 31496809. The next prime is 31496819. The reversal of 31496816 is 61869413.

It is a self number, because there is not a number n which added to its sum of digits gives 31496816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31496819) 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 7 ways as a sum of consecutive naturals, for example, 33440 + ... + 34368.

It is an arithmetic number, because the mean of its divisors is an integer number (1654842).

Almost surely, 2^31496816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31496816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33096840).

31496816 is an abundant number, since it is smaller than the sum of its proper divisors (34696864).

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

31496816 is a wasteful number, since it uses less digits than its factorization.

31496816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1107 counting only the distinct ones).

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

The square root of 31496816 is about 5612.2024197279. The cubic root of 31496816 is about 315.8073386306.

The spelling of 31496816 in words is "thirty-one million, four hundred ninety-six thousand, eight hundred sixteen".