28202880 has 128 divisors (see below), whose sum is σ = 92558880. Its totient is φ = 7299072.

The previous prime is 28202857. The next prime is 28202891. The reversal of 28202880 is 8820282.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70842 + ... + 71238.

Almost surely, 2^28202880 is an apocalyptic number.

28202880 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 28202880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46279440).

28202880 is an abundant number, since it is smaller than the sum of its proper divisors (64356000).

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

28202880 is a wasteful number, since it uses less digits than its factorization.

28202880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 28202880 is about 5310.6383797054. The cubic root of 28202880 is about 304.3905414639.

The spelling of 28202880 in words is "twenty-eight million, two hundred two thousand, eight hundred eighty".