99999240 has 192 divisors, whose sum is σ = 337841280. Its totient is φ = 23654400.

The previous prime is 99999217. The next prime is 99999247. The reversal of 99999240 is 4299999.

It is not an unprimeable number, because it can be changed into a prime (99999247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1030872 + ... + 1030968.

It is an arithmetic number, because the mean of its divisors is an integer number (1759590).

Almost surely, 2^99999240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168920640).

99999240 is an abundant number, since it is smaller than the sum of its proper divisors (237842040).

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

99999240 is a wasteful number, since it uses less digits than its factorization.

99999240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 51.

The square root of 99999240 is about 9999.9619999278. The cubic root of 99999240 is about 464.1577074891.

The spelling of 99999240 in words is "ninety-nine million, nine hundred ninety-nine thousand, two hundred forty".