28887020 has 24 divisors (see below), whose sum is σ = 61009200. Its totient is φ = 11488832.

The previous prime is 28887007. The next prime is 28887037. The reversal of 28887020 is 2078882.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 7614.

It is an arithmetic number, because the mean of its divisors is an integer number (2542050).

Almost surely, 2^28887020 is an apocalyptic number.

28887020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28887020 is an abundant number, since it is smaller than the sum of its proper divisors (32122180).

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

28887020 is a wasteful number, since it uses less digits than its factorization.

28887020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8257 (or 8255 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 28887020 is about 5374.6646407009. The cubic root of 28887020 is about 306.8321859044.

The spelling of 28887020 in words is "twenty-eight million, eight hundred eighty-seven thousand, twenty".