990937864 has 32 divisors (see below), whose sum is σ = 2126105280. Its totient is φ = 424154304.

The previous prime is 990937853. The next prime is 990937867. The reversal of 990937864 is 468739099.

It is not an unprimeable number, because it can be changed into a prime (990937867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35614 + ... + 57010.

It is an arithmetic number, because the mean of its divisors is an integer number (66440790).

Almost surely, 2^990937864 is an apocalyptic number.

It is an amenable number.

990937864 is an abundant number, since it is smaller than the sum of its proper divisors (1135167416).

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

990937864 is a wasteful number, since it uses less digits than its factorization.

990937864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22237 (or 22233 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 990937864 is about 31479.1655543790. The cubic root of 990937864 is about 996.9701170811.

The spelling of 990937864 in words is "nine hundred ninety million, nine hundred thirty-seven thousand, eight hundred sixty-four".