28555074 has 12 divisors (see below), whose sum is σ = 61869366. Its totient is φ = 9518352.

The previous prime is 28555069. The next prime is 28555091. The reversal of 28555074 is 47055582.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17164449 + 11390625 = 4143^2 + 3375^2 .

It is a super-2 number, since 2×28555074² = 1630784502290952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 793179 + ... + 793214.

Almost surely, 2^28555074 is an apocalyptic number.

28555074 is an abundant number, since it is smaller than the sum of its proper divisors (33314292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28555074 is a wasteful number, since it uses less digits than its factorization.

28555074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586401 (or 1586398 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 28555074 is about 5343.6947891885. The cubic root of 28555074 is about 305.6523669774.

The spelling of 28555074 in words is "twenty-eight million, five hundred fifty-five thousand, seventy-four".