28577224 has 48 divisors (see below), whose sum is σ = 60609600. Its totient is φ = 12602304.

The previous prime is 28577191. The next prime is 28577249. The reversal of 28577224 is 42277582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30637 + ... + 31555.

It is an arithmetic number, because the mean of its divisors is an integer number (1262700).

Almost surely, 2^28577224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28577224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30304800).

28577224 is an abundant number, since it is smaller than the sum of its proper divisors (32032376).

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

28577224 is a wasteful number, since it uses less digits than its factorization.

28577224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974 (or 957 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

The square root of 28577224 is about 5345.7669234638. The cubic root of 28577224 is about 305.7313774555.

The spelling of 28577224 in words is "twenty-eight million, five hundred seventy-seven thousand, two hundred twenty-four".