28561258 has 16 divisors (see below), whose sum is σ = 49486464. Its totient is φ = 12218560.

The previous prime is 28561249. The next prime is 28561271. The reversal of 28561258 is 85216582.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37810 + ... + 38557.

It is an arithmetic number, because the mean of its divisors is an integer number (3092904).

Almost surely, 2^28561258 is an apocalyptic number.

28561258 is a deficient number, since it is larger than the sum of its proper divisors (20925206).

28561258 is a wasteful number, since it uses less digits than its factorization.

28561258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76397.

The product of its digits is 38400, while the sum is 37.

The square root of 28561258 is about 5344.2733837258. The cubic root of 28561258 is about 305.6744298141.

It can be divided in two parts, 2856 and 1258, that added together give a palindrome (4114).

The spelling of 28561258 in words is "twenty-eight million, five hundred sixty-one thousand, two hundred fifty-eight".