99728256 has 64 divisors (see below), whose sum is σ = 280504080. Its totient is φ = 31285248.

The previous prime is 99728243. The next prime is 99728261. The reversal of 99728256 is 65282799.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 1111 + ... + 14166.

Almost surely, 2^99728256 is an apocalyptic number.

99728256 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 99728256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140252040).

99728256 is an abundant number, since it is smaller than the sum of its proper divisors (180775824).

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

99728256 is a wasteful number, since it uses less digits than its factorization.

99728256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15311 (or 15299 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 99728256 is about 9986.4035568367. The cubic root of 99728256 is about 463.7380606386.

The spelling of 99728256 in words is "ninety-nine million, seven hundred twenty-eight thousand, two hundred fifty-six".