2258728 has 16 divisors (see below), whose sum is σ = 4252500. Its totient is φ = 1124736.

The previous prime is 2258717. The next prime is 2258741. The reversal of 2258728 is 8278522.

It can be written as a sum of positive squares in 2 ways, for example, as 2010724 + 248004 = 1418^2 + 498^2 .

It is a super-3 number, since 3×2258728³ = 34571089098820333056, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2258693 and 2258702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2388 + ... + 3196.

2^2258728 is an apocalyptic number.

It is an amenable number.

2258728 is a deficient number, since it is larger than the sum of its proper divisors (1993772).

2258728 is a wasteful number, since it uses less digits than its factorization.

2258728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1160 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 2258728 is about 1502.9065173856. The cubic root of 2258728 is about 131.2062868790.

The spelling of 2258728 in words is "two million, two hundred fifty-eight thousand, seven hundred twenty-eight".