990794428 has 24 divisors (see below), whose sum is σ = 1874183360. Its totient is φ = 455595840.

The previous prime is 990794419. The next prime is 990794461. The reversal of 990794428 is 824497099.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21063 + ... + 49246.

Almost surely, 2^990794428 is an apocalyptic number.

It is an amenable number.

990794428 is a deficient number, since it is larger than the sum of its proper divisors (883388932).

990794428 is a wasteful number, since it uses less digits than its factorization.

990794428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70597 (or 70595 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 990794428 is about 31476.8872031527. The cubic root of 990794428 is about 996.9220117084.

The spelling of 990794428 in words is "nine hundred ninety million, seven hundred ninety-four thousand, four hundred twenty-eight".