28900099 has 4 divisors (see below), whose sum is σ = 28925064. Its totient is φ = 28875136.

The previous prime is 28900061. The next prime is 28900111. The reversal of 28900099 is 99000982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28900099 - 2⁹ = 28899587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28900499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10657 + ... + 13090.

It is an arithmetic number, because the mean of its divisors is an integer number (7231266).

Almost surely, 2^28900099 is an apocalyptic number.

28900099 is a deficient number, since it is larger than the sum of its proper divisors (24965).

28900099 is a wasteful number, since it uses less digits than its factorization.

28900099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24964.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 28900099 is about 5375.8812300868. The cubic root of 28900099 is about 306.8784864304.

The spelling of 28900099 in words is "twenty-eight million, nine hundred thousand, ninety-nine".