28837880 has 16 divisors (see below), whose sum is σ = 64885320. Its totient is φ = 11535136.

The previous prime is 28837873. The next prime is 28837901. The reversal of 28837880 is 8873882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360434 + ... + 360513.

Almost surely, 2^28837880 is an apocalyptic number.

28837880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28837880 is an abundant number, since it is smaller than the sum of its proper divisors (36047440).

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

28837880 is a wasteful number, since it uses less digits than its factorization.

28837880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720958 (or 720954 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 28837880 is about 5370.0912468970. The cubic root of 28837880 is about 306.6581020502.

The spelling of 28837880 in words is "twenty-eight million, eight hundred thirty-seven thousand, eight hundred eighty".