99992240 has 40 divisors (see below), whose sum is σ = 234635280. Its totient is φ = 39626496.

The previous prime is 99992239. The next prime is 99992251. The reversal of 99992240 is 4229999.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 99992191 and 99992200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2987 + ... + 14453.

It is an arithmetic number, because the mean of its divisors is an integer number (5865882).

Almost surely, 2^99992240 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 99992240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117317640).

99992240 is an abundant number, since it is smaller than the sum of its proper divisors (134643040).

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

99992240 is a wasteful number, since it uses less digits than its factorization.

99992240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589 (or 11583 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 99992240 is about 9999.6119924725. The cubic root of 99992240 is about 464.1468768076.

It can be divided in two parts, 999 and 92240, that added together give a palindrome (93239).

The spelling of 99992240 in words is "ninety-nine million, nine hundred ninety-two thousand, two hundred forty".