99481728 has 128 divisors (see below), whose sum is σ = 279267840. Its totient is φ = 31334400.

The previous prime is 99481717. The next prime is 99481757. The reversal of 99481728 is 82718499.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×99481728² = 19793228411731968, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726076 + ... + 726212.

It is an arithmetic number, because the mean of its divisors is an integer number (2181780).

Almost surely, 2^99481728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99481728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139633920).

99481728 is an abundant number, since it is smaller than the sum of its proper divisors (179786112).

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

99481728 is a wasteful number, since it uses less digits than its factorization.

99481728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 234 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 99481728 is about 9974.0527369771. The cubic root of 99481728 is about 463.3556255628.

The spelling of 99481728 in words is "ninety-nine million, four hundred eighty-one thousand, seven hundred twenty-eight".