99999256 has 16 divisors (see below), whose sum is σ = 214284240. Its totient is φ = 42856800.

The previous prime is 99999247. The next prime is 99999257. The reversal of 99999256 is 65299999.

It is a self number, because there is not a number n which added to its sum of digits gives 99999256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892795 + ... + 892906.

It is an arithmetic number, because the mean of its divisors is an integer number (13392765).

Almost surely, 2^99999256 is an apocalyptic number.

It is an amenable number.

99999256 is an abundant number, since it is smaller than the sum of its proper divisors (114284984).

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

99999256 is a wasteful number, since it uses less digits than its factorization.

99999256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785714 (or 1785710 counting only the distinct ones).

The product of its digits is 3542940, while the sum is 58.

The square root of 99999256 is about 9999.9627999308. The cubic root of 99999256 is about 464.1577322444.

The spelling of 99999256 in words is "ninety-nine million, nine hundred ninety-nine thousand, two hundred fifty-six".