990280968 has 64 divisors (see below), whose sum is σ = 2512823040. Its totient is φ = 325168704.

The previous prime is 990280961. The next prime is 990280999. The reversal of 990280968 is 869082099.

It is a self number, because there is not a number n which added to its sum of digits gives 990280968.

It is not an unprimeable number, because it can be changed into a prime (990280961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1121055 + ... + 1121937.

It is an arithmetic number, because the mean of its divisors is an integer number (39262860).

Almost surely, 2^990280968 is an apocalyptic number.

It is an amenable number.

990280968 is an abundant number, since it is smaller than the sum of its proper divisors (1522542072).

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

990280968 is a wasteful number, since it uses less digits than its factorization.

990280968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 990280968 is about 31468.7300029728. The cubic root of 990280968 is about 996.7497701175.

The spelling of 990280968 in words is "nine hundred ninety million, two hundred eighty thousand, nine hundred sixty-eight".