99992540 has 12 divisors (see below), whose sum is σ = 209984376. Its totient is φ = 39997008.

The previous prime is 99992539. The next prime is 99992617. The reversal of 99992540 is 4529999.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2499794 + ... + 2499833.

It is an arithmetic number, because the mean of its divisors is an integer number (17498698).

Almost surely, 2^99992540 is an apocalyptic number.

It is an amenable number.

99992540 is an abundant number, since it is smaller than the sum of its proper divisors (109991836).

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

99992540 is a wasteful number, since it uses less digits than its factorization.

99992540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999636 (or 4999634 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 99992540 is about 9999.6269930433. The cubic root of 99992540 is about 464.1473409900.

It can be divided in two parts, 999 and 92540, that added together give a palindrome (93539).

The spelling of 99992540 in words is "ninety-nine million, nine hundred ninety-two thousand, five hundred forty".