28254591 has 6 divisors (see below), whose sum is σ = 40812200. Its totient is φ = 18836388.

The previous prime is 28254581. The next prime is 28254593. The reversal of 28254591 is 19545282.

28254591 is a `hidden beast` number, since 28 + 2 + 545 + 91 = 666.

It is not a de Polignac number, because 28254591 - 2¹⁰ = 28253567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28254593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1569691 + ... + 1569708.

Almost surely, 2^28254591 is an apocalyptic number.

28254591 is a deficient number, since it is larger than the sum of its proper divisors (12557609).

28254591 is a wasteful number, since it uses less digits than its factorization.

28254591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139405 (or 3139402 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 28254591 is about 5315.5047737727. The cubic root of 28254591 is about 304.5764648982.

The spelling of 28254591 in words is "twenty-eight million, two hundred fifty-four thousand, five hundred ninety-one".