990385826 has 16 divisors (see below), whose sum is σ = 1508881920. Its totient is φ = 487436400.

The previous prime is 990385777. The next prime is 990385843. The reversal of 990385826 is 628583099.

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, 298376 + ... + 301676.

It is an arithmetic number, because the mean of its divisors is an integer number (94305120).

Almost surely, 2^990385826 is an apocalyptic number.

990385826 is a deficient number, since it is larger than the sum of its proper divisors (518496094).

990385826 is a wasteful number, since it uses less digits than its factorization.

990385826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 990385826 is about 31470.3960254713. The cubic root of 990385826 is about 996.7849498635.

The spelling of 990385826 in words is "nine hundred ninety million, three hundred eighty-five thousand, eight hundred twenty-six".