99942290 has 16 divisors (see below), whose sum is σ = 205595712. Its totient is φ = 34265904.

The previous prime is 99942289. The next prime is 99942317. The reversal of 99942290 is 9224999.

It is a super-2 number, since 2×99942290² = 19976922660888200, which contains 22 as substring.

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, 713804 + ... + 713943.

It is an arithmetic number, because the mean of its divisors is an integer number (12849732).

Almost surely, 2^99942290 is an apocalyptic number.

99942290 is an abundant number, since it is smaller than the sum of its proper divisors (105653422).

99942290 is a wasteful number, since it uses less digits than its factorization.

99942290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427761.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 99942290 is about 9997.1140835743. The cubic root of 99942290 is about 464.0695774824.

The spelling of 99942290 in words is "ninety-nine million, nine hundred forty-two thousand, two hundred ninety".