28512057 has 8 divisors (see below), whose sum is σ = 43446976. Its totient is φ = 16292592.

The previous prime is 28512049. The next prime is 28512067. The reversal of 28512057 is 75021582.

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

It is not a de Polignac number, because 28512057 - 2³ = 28512049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28512037) 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, 678838 + ... + 678879.

It is an arithmetic number, because the mean of its divisors is an integer number (5430872).

Almost surely, 2^28512057 is an apocalyptic number.

It is an amenable number.

28512057 is a deficient number, since it is larger than the sum of its proper divisors (14934919).

28512057 is a wasteful number, since it uses less digits than its factorization.

28512057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357727.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 28512057 is about 5339.6682481218. The cubic root of 28512057 is about 305.4988057595.

The spelling of 28512057 in words is "twenty-eight million, five hundred twelve thousand, fifty-seven".