28512934 has 4 divisors (see below), whose sum is σ = 42769404. Its totient is φ = 14256466.

The previous prime is 28512923. The next prime is 28512943. The reversal of 28512934 is 43921582.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28512934.

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, 7128232 + ... + 7128235.

It is an arithmetic number, because the mean of its divisors is an integer number (10692351).

Almost surely, 2^28512934 is an apocalyptic number.

28512934 is a deficient number, since it is larger than the sum of its proper divisors (14256470).

28512934 is a wasteful number, since it uses less digits than its factorization.

28512934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14256469.

The product of its digits is 17280, while the sum is 34.

The square root of 28512934 is about 5339.7503686970. The cubic root of 28512934 is about 305.5019379982.

The spelling of 28512934 in words is "twenty-eight million, five hundred twelve thousand, nine hundred thirty-four".