996481920 has 128 divisors (see below), whose sum is σ = 3630090240. Its totient is φ = 227764224.

The previous prime is 996481897. The next prime is 996481931. The reversal of 996481920 is 29184699.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 996481920.

It is a congruent number.

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, 23632 + ... + 50511.

It is an arithmetic number, because the mean of its divisors is an integer number (28360080).

Almost surely, 2^996481920 is an apocalyptic number.

It is an amenable number.

996481920 is an abundant number, since it is smaller than the sum of its proper divisors (2633608320).

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

996481920 is a wasteful number, since it uses less digits than its factorization.

996481920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74172 (or 74160 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 996481920 is about 31567.1018625404. The cubic root of 996481920 is about 998.8259287629.

The spelling of 996481920 in words is "nine hundred ninety-six million, four hundred eighty-one thousand, nine hundred twenty".