99181628 has 24 divisors (see below), whose sum is σ = 213622752. Its totient is φ = 39236544.

The previous prime is 99181619. The next prime is 99181657. The reversal of 99181628 is 82618199.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 135875 + ... + 136602.

It is an arithmetic number, because the mean of its divisors is an integer number (8900948).

Almost surely, 2^99181628 is an apocalyptic number.

It is an amenable number.

99181628 is an abundant number, since it is smaller than the sum of its proper divisors (114441124).

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

99181628 is a wasteful number, since it uses less digits than its factorization.

99181628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272501 (or 272499 counting only the distinct ones).

The product of its digits is 62208, while the sum is 44.

The square root of 99181628 is about 9958.9973390899. The cubic root of 99181628 is about 462.8892314324.

The spelling of 99181628 in words is "ninety-nine million, one hundred eighty-one thousand, six hundred twenty-eight".