990040672 has 24 divisors (see below), whose sum is σ = 2001824496. Its totient is φ = 481640832.

The previous prime is 990040661. The next prime is 990040693. The reversal of 990040672 is 276040099.

It is a super-3 number, since 3×990040672³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416908 + ... + 419275.

It is an arithmetic number, because the mean of its divisors is an integer number (83409354).

Almost surely, 2^990040672 is an apocalyptic number.

It is an amenable number.

990040672 is an abundant number, since it is smaller than the sum of its proper divisors (1011783824).

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

990040672 is a wasteful number, since it uses less digits than its factorization.

990040672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836230 (or 836222 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 990040672 is about 31464.9117589737. The cubic root of 990040672 is about 996.6691417012.

The spelling of 990040672 in words is "nine hundred ninety million, forty thousand, six hundred seventy-two".