31404996 has 120 divisors (see below), whose sum is σ = 95785536. Its totient is φ = 8786880.

The previous prime is 31404983. The next prime is 31405021. The reversal of 31404996 is 69940413.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 31404996.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 138235 + ... + 138461.

Almost surely, 2^31404996 is an apocalyptic number.

31404996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31404996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47892768).

31404996 is an abundant number, since it is smaller than the sum of its proper divisors (64380540).

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

31404996 is a wasteful number, since it uses less digits than its factorization.

31404996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 31404996 is about 5604.0160599342. The cubic root of 31404996 is about 315.5001578088.

It can be divided in two parts, 31404 and 996, that added together give a square (32400 = 180²).

The spelling of 31404996 in words is "thirty-one million, four hundred four thousand, nine hundred ninety-six".