28230657 has 16 divisors (see below), whose sum is σ = 46327680. Its totient is φ = 14890752.

The previous prime is 28230647. The next prime is 28230701. The reversal of 28230657 is 75603282.

It is not a de Polignac number, because 28230657 - 2⁷ = 28230529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28230607) 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, 51432 + ... + 51977.

It is an arithmetic number, because the mean of its divisors is an integer number (2895480).

Almost surely, 2^28230657 is an apocalyptic number.

It is an amenable number.

28230657 is a deficient number, since it is larger than the sum of its proper divisors (18097023).

28230657 is a wasteful number, since it uses less digits than its factorization.

28230657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103432.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28230657 is about 5313.2529584050. The cubic root of 28230657 is about 304.4904400298.

The spelling of 28230657 in words is "twenty-eight million, two hundred thirty thousand, six hundred fifty-seven".