99090438 has 8 divisors (see below), whose sum is σ = 198180888. Its totient is φ = 33030144.

The previous prime is 99090437. The next prime is 99090457. The reversal of 99090438 is 83409099.

It is a sphenic number, since it is the product of 3 distinct primes.

99090438 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 99090438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99090437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8257531 + ... + 8257542.

It is an arithmetic number, because the mean of its divisors is an integer number (24772611).

Almost surely, 2^99090438 is an apocalyptic number.

99090438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99090438 is a wasteful number, since it uses less digits than its factorization.

99090438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16515078.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 99090438 is about 9954.4180141282. The cubic root of 99090438 is about 462.7473240615.

The spelling of 99090438 in words is "ninety-nine million, ninety thousand, four hundred thirty-eight".