99400590 has 48 divisors (see below), whose sum is σ = 272048400. Its totient is φ = 25111296.

The previous prime is 99400589. The next prime is 99400607. The reversal of 99400590 is 9500499.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27355 + ... + 30774.

It is an arithmetic number, because the mean of its divisors is an integer number (5667675).

Almost surely, 2^99400590 is an apocalyptic number.

99400590 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99400590 is an abundant number, since it is smaller than the sum of its proper divisors (172647810).

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

99400590 is a wasteful number, since it uses less digits than its factorization.

99400590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58161 (or 58158 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 99400590 is about 9969.9844533480. The cubic root of 99400590 is about 463.2296192591.

It can be divided in two parts, 99 and 400590, that added together give a square (400689 = 633²).

The spelling of 99400590 in words is "ninety-nine million, four hundred thousand, five hundred ninety".