99911838 has 16 divisors (see below), whose sum is σ = 215194896. Its totient is φ = 30742080.

The previous prime is 99911827. The next prime is 99911849. The reversal of 99911838 is 83811999.

It is an interprime number because it is at equal distance from previous prime (99911827) and next prime (99911849).

It is a congruent number.

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, 640383 + ... + 640538.

It is an arithmetic number, because the mean of its divisors is an integer number (13449681).

Almost surely, 2^99911838 is an apocalyptic number.

99911838 is an abundant number, since it is smaller than the sum of its proper divisors (115283058).

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

99911838 is a wasteful number, since it uses less digits than its factorization.

99911838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280939.

The product of its digits is 139968, while the sum is 48.

The square root of 99911838 is about 9995.5909280042. The cubic root of 99911838 is about 464.0224393379.

The spelling of 99911838 in words is "ninety-nine million, nine hundred eleven thousand, eight hundred thirty-eight".