28086880 has 24 divisors (see below), whose sum is σ = 66355632. Its totient is φ = 11234688.

The previous prime is 28086859. The next prime is 28086893. The reversal of 28086880 is 8868082.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87612 + ... + 87931.

It is an arithmetic number, because the mean of its divisors is an integer number (2764818).

Almost surely, 2^28086880 is an apocalyptic number.

28086880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28086880 is an abundant number, since it is smaller than the sum of its proper divisors (38268752).

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

28086880 is a wasteful number, since it uses less digits than its factorization.

28086880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175558 (or 175550 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 28086880 is about 5299.7056522037. The cubic root of 28086880 is about 303.9726429676.

The spelling of 28086880 in words is "twenty-eight million, eighty-six thousand, eight hundred eighty".