99388550 has 24 divisors (see below), whose sum is σ = 188800416. Its totient is φ = 38908640.

The previous prime is 99388507. The next prime is 99388561. The reversal of 99388550 is 5588399.

It is a super-2 number, since 2×99388550² = 19756167742205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a junction number, because it is equal to n+sod(n) for n = 99388495 and 99388504.

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 11 ways as a sum of consecutive naturals, for example, 18797 + ... + 23496.

It is an arithmetic number, because the mean of its divisors is an integer number (7866684).

Almost surely, 2^99388550 is an apocalyptic number.

99388550 is a deficient number, since it is larger than the sum of its proper divisors (89411866).

99388550 is a wasteful number, since it uses less digits than its factorization.

99388550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42352 (or 42347 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 99388550 is about 9969.3806226866. The cubic root of 99388550 is about 463.2109154472.

The spelling of 99388550 in words is "ninety-nine million, three hundred eighty-eight thousand, five hundred fifty".