99998720 has 44 divisors (see below), whose sum is σ = 239892024. Its totient is φ = 39997440.

The previous prime is 99998663. The next prime is 99998749. The reversal of 99998720 is 2789999.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4646 + ... + 14885.

Almost surely, 2^99998720 is an apocalyptic number.

It is an amenable number.

99998720 is an abundant number, since it is smaller than the sum of its proper divisors (139893304).

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

99998720 is a wasteful number, since it uses less digits than its factorization.

99998720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19556 (or 19538 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 99998720 is about 9999.9359997952. The cubic root of 99998720 is about 464.1569029416.

The spelling of 99998720 in words is "ninety-nine million, nine hundred ninety-eight thousand, seven hundred twenty".