990073764 has 18 divisors (see below), whose sum is σ = 2502686550. Its totient is φ = 330024576.

The previous prime is 990073759. The next prime is 990073769. The reversal of 990073764 is 467370099.

It is an interprime number because it is at equal distance from previous prime (990073759) and next prime (990073769).

It can be written as a sum of positive squares in only one way, i.e., 525326400 + 464747364 = 22920^2 + 21558^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×990073764² = 1960492116322255392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990073769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13750989 + ... + 13751060.

Almost surely, 2^990073764 is an apocalyptic number.

It is an amenable number.

990073764 is an abundant number, since it is smaller than the sum of its proper divisors (1512612786).

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

990073764 is a wasteful number, since it uses less digits than its factorization.

990073764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27502059 (or 27502054 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 990073764 is about 31465.4376101779. The cubic root of 990073764 is about 996.6802460961.

The spelling of 990073764 in words is "nine hundred ninety million, seventy-three thousand, seven hundred sixty-four".