99742728 has 64 divisors (see below), whose sum is σ = 254367360. Its totient is φ = 32587776.

The previous prime is 99742711. The next prime is 99742729. The reversal of 99742728 is 82724799.

It is a super-2 number, since 2×99742728² = 19897223577763968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99742729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387976 + ... + 388232.

It is an arithmetic number, because the mean of its divisors is an integer number (3974490).

Almost surely, 2^99742728 is an apocalyptic number.

It is an amenable number.

99742728 is an abundant number, since it is smaller than the sum of its proper divisors (154624632).

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

99742728 is a wasteful number, since it uses less digits than its factorization.

99742728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 522 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 99742728 is about 9987.1281157298. The cubic root of 99742728 is about 463.7604912344.

The spelling of 99742728 in words is "ninety-nine million, seven hundred forty-two thousand, seven hundred twenty-eight".