28759280 has 60 divisors (see below), whose sum is σ = 73521336. Its totient is φ = 10454400.

The previous prime is 28759273. The next prime is 28759321. The reversal of 28759280 is 8295782.

It is a happy number.

It is a super-2 number, since 2×28759280² = 1654192372236800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8195 + ... + 11165.

Almost surely, 2^28759280 is an apocalyptic number.

28759280 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 28759280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36760668).

28759280 is an abundant number, since it is smaller than the sum of its proper divisors (44762056).

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

28759280 is a wasteful number, since it uses less digits than its factorization.

28759280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006 (or 2989 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28759280 is about 5362.7679420240. The cubic root of 28759280 is about 306.3792412998.

The spelling of 28759280 in words is "twenty-eight million, seven hundred fifty-nine thousand, two hundred eighty".