99648690 has 16 divisors (see below), whose sum is σ = 239156928. Its totient is φ = 26572976.

The previous prime is 99648677. The next prime is 99648691. The reversal of 99648690 is 9684699.

It is a super-2 number, since 2×99648690² = 19859722837432200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99648691) 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, 1660782 + ... + 1660841.

It is an arithmetic number, because the mean of its divisors is an integer number (14947308).

Almost surely, 2^99648690 is an apocalyptic number.

99648690 is an abundant number, since it is smaller than the sum of its proper divisors (139508238).

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

99648690 is a wasteful number, since it uses less digits than its factorization.

99648690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321633.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 99648690 is about 9982.4190455019. The cubic root of 99648690 is about 463.6147000818.

The spelling of 99648690 in words is "ninety-nine million, six hundred forty-eight thousand, six hundred ninety".