99990690 has 32 divisors (see below), whose sum is σ = 241577856. Its totient is φ = 26486400.

The previous prime is 99990679. The next prime is 99990703. The reversal of 99990690 is 9609999.

It is a super-2 number, since 2×99990690² = 19996276173352200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6507 + ... + 15566.

It is an arithmetic number, because the mean of its divisors is an integer number (7549308).

Almost surely, 2^99990690 is an apocalyptic number.

99990690 is an abundant number, since it is smaller than the sum of its proper divisors (141587166).

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

99990690 is a wasteful number, since it uses less digits than its factorization.

99990690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22234.

The product of its (nonzero) digits is 354294, while the sum is 51.

The square root of 99990690 is about 9999.5344891650. The cubic root of 99990690 is about 464.1444785169.

The spelling of 99990690 in words is "ninety-nine million, nine hundred ninety thousand, six hundred ninety".