99420768 has 72 divisors (see below), whose sum is σ = 297624600. Its totient is φ = 31394304.

The previous prime is 99420767. The next prime is 99420781. The reversal of 99420768 is 86702499.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99420767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3613 + ... + 14556.

It is an arithmetic number, because the mean of its divisors is an integer number (4133675).

Almost surely, 2^99420768 is an apocalyptic number.

It is an amenable number.

99420768 is an abundant number, since it is smaller than the sum of its proper divisors (198203832).

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

99420768 is a wasteful number, since it uses less digits than its factorization.

99420768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18204 (or 18193 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 99420768 is about 9970.9963393835. The cubic root of 99420768 is about 463.2609618459.

The spelling of 99420768 in words is "ninety-nine million, four hundred twenty thousand, seven hundred sixty-eight".