99558540 has 36 divisors (see below), whose sum is σ = 301994784. Its totient is φ = 26548896.

The previous prime is 99558533. The next prime is 99558541. The reversal of 99558540 is 4585599.

99558540 is a `hidden beast` number, since 99 + 558 + 5 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (99558541) 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, 276372 + ... + 276731.

It is an arithmetic number, because the mean of its divisors is an integer number (8388744).

Almost surely, 2^99558540 is an apocalyptic number.

99558540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99558540 is an abundant number, since it is smaller than the sum of its proper divisors (202436244).

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

99558540 is a wasteful number, since it uses less digits than its factorization.

99558540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553118 (or 553113 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 99558540 is about 9977.9025852130. The cubic root of 99558540 is about 463.4748505257.

The spelling of 99558540 in words is "ninety-nine million, five hundred fifty-eight thousand, five hundred forty".