28574720 has 44 divisors (see below), whose sum is σ = 68558124. Its totient is φ = 11427840.

The previous prime is 28574719. The next prime is 28574723. The reversal of 28574720 is 2747582.

It can be written as a sum of positive squares in 2 ways, for example, as 9634816 + 18939904 = 3104^2 + 4352^2 .

It is not an unprimeable number, because it can be changed into a prime (28574723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2330 + ... + 7910.

Almost surely, 2^28574720 is an apocalyptic number.

28574720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28574720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34279062).

28574720 is an abundant number, since it is smaller than the sum of its proper divisors (39983404).

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

28574720 is an equidigital number, since it uses as much as digits as its factorization.

28574720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606 (or 5588 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 28574720 is about 5345.5327143326. The cubic root of 28574720 is about 305.7224475733.

The spelling of 28574720 in words is "twenty-eight million, five hundred seventy-four thousand, seven hundred twenty".