28274385 has 16 divisors (see below), whose sum is σ = 45587520. Its totient is φ = 14963520.

The previous prime is 28274381. The next prime is 28274431. The reversal of 28274385 is 58347282.

It is not a de Polignac number, because 28274385 - 2² = 28274381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28274381) 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, 5230 + ... + 9159.

It is an arithmetic number, because the mean of its divisors is an integer number (2849220).

Almost surely, 2^28274385 is an apocalyptic number.

It is an amenable number.

28274385 is a deficient number, since it is larger than the sum of its proper divisors (17313135).

28274385 is a wasteful number, since it uses less digits than its factorization.

28274385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14528.

The product of its digits is 107520, while the sum is 39.

The square root of 28274385 is about 5317.3663593926. The cubic root of 28274385 is about 304.6475728614.

The spelling of 28274385 in words is "twenty-eight million, two hundred seventy-four thousand, three hundred eighty-five".