28513080 has 128 divisors (see below), whose sum is σ = 100699200. Its totient is φ = 7151616.

The previous prime is 28513057. The next prime is 28513109. The reversal of 28513080 is 8031582.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17584 + ... + 19136.

Almost surely, 2^28513080 is an apocalyptic number.

28513080 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 28513080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50349600).

28513080 is an abundant number, since it is smaller than the sum of its proper divisors (72186120).

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

28513080 is a wasteful number, since it uses less digits than its factorization.

28513080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1580 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28513080 is about 5339.7640397306. The cubic root of 28513080 is about 305.5024594365.

The spelling of 28513080 in words is "twenty-eight million, five hundred thirteen thousand, eighty".