99997408 has 24 divisors (see below), whose sum is σ = 224994672. Its totient is φ = 42855936.

The previous prime is 99997393. The next prime is 99997411. The reversal of 99997408 is 80479999.

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, 222985 + ... + 223432.

It is an arithmetic number, because the mean of its divisors is an integer number (9374778).

Almost surely, 2^99997408 is an apocalyptic number.

It is an amenable number.

99997408 is an abundant number, since it is smaller than the sum of its proper divisors (124997264).

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

99997408 is a wasteful number, since it uses less digits than its factorization.

99997408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446434 (or 446426 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 99997408 is about 9999.8703991602. The cubic root of 99997408 is about 464.1548729939.

The spelling of 99997408 in words is "ninety-nine million, nine hundred ninety-seven thousand, four hundred eight".