99907828 has 6 divisors (see below), whose sum is σ = 174838706. Its totient is φ = 49953912.

The previous prime is 99907781. The next prime is 99907849. The reversal of 99907828 is 82870999.

It can be written as a sum of positive squares in only one way, i.e., 88698724 + 11209104 = 9418^2 + 3348^2 .

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, 12488475 + ... + 12488482.

Almost surely, 2^99907828 is an apocalyptic number.

It is an amenable number.

99907828 is a deficient number, since it is larger than the sum of its proper divisors (74930878).

99907828 is a wasteful number, since it uses less digits than its factorization.

99907828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24976961 (or 24976959 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 99907828 is about 9995.3903375506. The cubic root of 99907828 is about 464.0162313486.

The spelling of 99907828 in words is "ninety-nine million, nine hundred seven thousand, eight hundred twenty-eight".