99768840 has 32 divisors (see below), whose sum is σ = 299306880. Its totient is φ = 26604992.

The previous prime is 99768817. The next prime is 99768847. The reversal of 99768840 is 4886799.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (99768847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415584 + ... + 415823.

It is an arithmetic number, because the mean of its divisors is an integer number (9353340).

Almost surely, 2^99768840 is an apocalyptic number.

It is an amenable number.

99768840 is an abundant number, since it is smaller than the sum of its proper divisors (199538040).

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

99768840 is a wasteful number, since it uses less digits than its factorization.

99768840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831421 (or 831417 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 99768840 is about 9988.4353129006. The cubic root of 99768840 is about 463.8009575341.

The spelling of 99768840 in words is "ninety-nine million, seven hundred sixty-eight thousand, eight hundred forty".