99489428 has 6 divisors (see below), whose sum is σ = 174106506. Its totient is φ = 49744712.

The previous prime is 99489413. The next prime is 99489431. The reversal of 99489428 is 82498499.

It can be written as a sum of positive squares in only one way, i.e., 94051204 + 5438224 = 9698^2 + 2332^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 99489428.

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, 12436175 + ... + 12436182.

It is an arithmetic number, because the mean of its divisors is an integer number (29017751).

Almost surely, 2^99489428 is an apocalyptic number.

It is an amenable number.

99489428 is a deficient number, since it is larger than the sum of its proper divisors (74617078).

99489428 is a wasteful number, since it uses less digits than its factorization.

99489428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24872361 (or 24872359 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 53.

The square root of 99489428 is about 9974.4387310766. The cubic root of 99489428 is about 463.3675800069.

The spelling of 99489428 in words is "ninety-nine million, four hundred eighty-nine thousand, four hundred twenty-eight".