28274451 has 16 divisors (see below), whose sum is σ = 42019200. Its totient is φ = 16806528.

The previous prime is 28274447. The next prime is 28274453. The reversal of 28274451 is 15447282.

It is not a de Polignac number, because 28274451 - 2² = 28274447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28274453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13621 + ... + 15558.

It is an arithmetic number, because the mean of its divisors is an integer number (2626200).

Almost surely, 2^28274451 is an apocalyptic number.

28274451 is a deficient number, since it is larger than the sum of its proper divisors (13744749).

28274451 is a wasteful number, since it uses less digits than its factorization.

28274451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29218.

The product of its digits is 17920, while the sum is 33.

The square root of 28274451 is about 5317.3725654688. The cubic root of 28274451 is about 304.6478099043.

The spelling of 28274451 in words is "twenty-eight million, two hundred seventy-four thousand, four hundred fifty-one".