28574464 has 54 divisors (see below), whose sum is σ = 59907596. Its totient is φ = 13601280.

The previous prime is 28574443. The next prime is 28574519. The reversal of 28574464 is 46447582.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135319 + ... + 135529.

Almost surely, 2^28574464 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 28574464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29953798).

28574464 is an abundant number, since it is smaller than the sum of its proper divisors (31333132).

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

28574464 is an equidigital number, since it uses as much as digits as its factorization.

28574464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 236 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 28574464 is about 5345.5087690509. The cubic root of 28574464 is about 305.7215345847.

The spelling of 28574464 in words is "twenty-eight million, five hundred seventy-four thousand, four hundred sixty-four".