28456899 has 8 divisors (see below), whose sum is σ = 38141952. Its totient is φ = 18871560.

The previous prime is 28456891. The next prime is 28456913. The reversal of 28456899 is 99865482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28456899 - 2³ = 28456891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28456891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24259 + ... + 25404.

It is an arithmetic number, because the mean of its divisors is an integer number (4767744).

Almost surely, 2^28456899 is an apocalyptic number.

28456899 is a deficient number, since it is larger than the sum of its proper divisors (9685053).

28456899 is a wasteful number, since it uses less digits than its factorization.

28456899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49857.

The product of its digits is 1244160, while the sum is 51.

The square root of 28456899 is about 5334.5008201330. The cubic root of 28456899 is about 305.3016776813.

The spelling of 28456899 in words is "twenty-eight million, four hundred fifty-six thousand, eight hundred ninety-nine".