99391760 has 40 divisors (see below), whose sum is σ = 248864280. Its totient is φ = 36698112.

The previous prime is 99391757. The next prime is 99391771. The reversal of 99391760 is 6719399.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5456896 + 93934864 = 2336^2 + 9692^2 .

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

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, 46745 + ... + 48824.

It is an arithmetic number, because the mean of its divisors is an integer number (6221607).

Almost surely, 2^99391760 is an apocalyptic number.

It is an amenable number.

99391760 is an abundant number, since it is smaller than the sum of its proper divisors (149472520).

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

99391760 is a wasteful number, since it uses less digits than its factorization.

99391760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95595 (or 95589 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 99391760 is about 9969.5416143371. The cubic root of 99391760 is about 463.2159022424.

The spelling of 99391760 in words is "ninety-nine million, three hundred ninety-one thousand, seven hundred sixty".