99690408 has 48 divisors (see below), whose sum is σ = 272406420. Its totient is φ = 32933376.

The previous prime is 99690401. The next prime is 99690421. The reversal of 99690408 is 80409699.

It can be written as a sum of positive squares in 2 ways, for example, as 89075844 + 10614564 = 9438^2 + 3258^2 .

It is not an unprimeable number, because it can be changed into a prime (99690401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2010 + ... + 14262.

Almost surely, 2^99690408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99690408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136203210).

99690408 is an abundant number, since it is smaller than the sum of its proper divisors (172716012).

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

99690408 is a wasteful number, since it uses less digits than its factorization.

99690408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12378 (or 12371 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 99690408 is about 9984.5084005173. The cubic root of 99690408 is about 463.6793886045.

The spelling of 99690408 in words is "ninety-nine million, six hundred ninety thousand, four hundred eight".