99990768 has 40 divisors (see below), whose sum is σ = 271907200. Its totient is φ = 31575744.

The previous prime is 99990757. The next prime is 99990799. The reversal of 99990768 is 86709999.

It is a Harshad number since it is a multiple of its sum of digits (57).

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 7 ways as a sum of consecutive naturals, for example, 53908 + ... + 55731.

It is an arithmetic number, because the mean of its divisors is an integer number (6797680).

Almost surely, 2^99990768 is an apocalyptic number.

It is an amenable number.

99990768 is an abundant number, since it is smaller than the sum of its proper divisors (171916432).

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

99990768 is a wasteful number, since it uses less digits than its factorization.

99990768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109669 (or 109663 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 99990768 is about 9999.5383893458. The cubic root of 99990768 is about 464.1445992057.

The spelling of 99990768 in words is "ninety-nine million, nine hundred ninety thousand, seven hundred sixty-eight".