99186440 has 16 divisors (see below), whose sum is σ = 223169580. Its totient is φ = 39674560.

The previous prime is 99186433. The next prime is 99186463. The reversal of 99186440 is 4468199.

It can be written as a sum of positive squares in 2 ways, for example, as 89908324 + 9278116 = 9482^2 + 3046^2 .

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, 1239791 + ... + 1239870.

Almost surely, 2^99186440 is an apocalyptic number.

It is an amenable number.

99186440 is an abundant number, since it is smaller than the sum of its proper divisors (123983140).

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

99186440 is a wasteful number, since it uses less digits than its factorization.

99186440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479672 (or 2479668 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 99186440 is about 9959.2389267454. The cubic root of 99186440 is about 462.8967173180.

The spelling of 99186440 in words is "ninety-nine million, one hundred eighty-six thousand, four hundred forty".