99999456 has 96 divisors (see below), whose sum is σ = 275788800. Its totient is φ = 31689216.

The previous prime is 99999439. The next prime is 99999481. The reversal of 99999456 is 65499999.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 99999456.

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 15 ways as a sum of consecutive naturals, for example, 166645 + ... + 167243.

It is an arithmetic number, because the mean of its divisors is an integer number (2872800).

Almost surely, 2^99999456 is an apocalyptic number.

99999456 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137894400).

99999456 is an abundant number, since it is smaller than the sum of its proper divisors (175789344).

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

99999456 is a wasteful number, since it uses less digits than its factorization.

99999456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 688 counting only the distinct ones).

The product of its digits is 7085880, while the sum is 60.

The square root of 99999456 is about 9999.9727999630. The cubic root of 99999456 is about 464.1580416850.

The spelling of 99999456 in words is "ninety-nine million, nine hundred ninety-nine thousand, four hundred fifty-six".