99643028 has 6 divisors (see below), whose sum is σ = 174375306. Its totient is φ = 49821512.

The previous prime is 99643013. The next prime is 99643091. The reversal of 99643028 is 82034699.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 99640324 + 2704 = 9982^2 + 52^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12455375 + ... + 12455382.

It is an arithmetic number, because the mean of its divisors is an integer number (29062551).

Almost surely, 2^99643028 is an apocalyptic number.

It is an amenable number.

99643028 is a deficient number, since it is larger than the sum of its proper divisors (74732278).

99643028 is a wasteful number, since it uses less digits than its factorization.

99643028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24910761 (or 24910759 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 99643028 is about 9982.1354428799. The cubic root of 99643028 is about 463.6059191128.

The spelling of 99643028 in words is "ninety-nine million, six hundred forty-three thousand, twenty-eight".