99288240 has 80 divisors (see below), whose sum is σ = 321193728. Its totient is φ = 25324288.

The previous prime is 99288221. The next prime is 99288251. The reversal of 99288240 is 4288299.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 99288192 and 99288201.

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, 3474 + ... + 14513.

Almost surely, 2^99288240 is an apocalyptic number.

It is an amenable number.

99288240 is an abundant number, since it is smaller than the sum of its proper divisors (221905488).

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

99288240 is a wasteful number, since it uses less digits than its factorization.

99288240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18026 (or 18020 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 99288240 is about 9964.3484483432. The cubic root of 99288240 is about 463.0550278474.

The spelling of 99288240 in words is "ninety-nine million, two hundred eighty-eight thousand, two hundred forty".