99990140 has 12 divisors (see below), whose sum is σ = 209979336. Its totient is φ = 39996048.

The previous prime is 99990139. The next prime is 99990161. The reversal of 99990140 is 4109999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2499734 + ... + 2499773.

It is an arithmetic number, because the mean of its divisors is an integer number (17498278).

Almost surely, 2^99990140 is an apocalyptic number.

It is an amenable number.

99990140 is an abundant number, since it is smaller than the sum of its proper divisors (109989196).

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

99990140 is a wasteful number, since it uses less digits than its factorization.

99990140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999516 (or 4999514 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 99990140 is about 9999.5069878470. The cubic root of 99990140 is about 464.1436275046.

The spelling of 99990140 in words is "ninety-nine million, nine hundred ninety thousand, one hundred forty".