99987240 has 64 divisors (see below), whose sum is σ = 300749760. Its totient is φ = 26593280.

The previous prime is 99987221. The next prime is 99987257. The reversal of 99987240 is 4278999.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 99987240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58072 + ... + 59768.

It is an arithmetic number, because the mean of its divisors is an integer number (4699215).

Almost surely, 2^99987240 is an apocalyptic number.

It is an amenable number.

99987240 is an abundant number, since it is smaller than the sum of its proper divisors (200762520).

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

99987240 is a wasteful number, since it uses less digits than its factorization.

99987240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2198 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 99987240 is about 9999.3619796465. The cubic root of 99987240 is about 464.1391402970.

The spelling of 99987240 in words is "ninety-nine million, nine hundred eighty-seven thousand, two hundred forty".