28851880 has 32 divisors (see below), whose sum is σ = 68335200. Its totient is φ = 10933056.

The previous prime is 28851877. The next prime is 28851881. The reversal of 28851880 is 8815882.

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

It is not an unprimeable number, because it can be changed into a prime (28851881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18222 + ... + 19741.

It is an arithmetic number, because the mean of its divisors is an integer number (2135475).

Almost surely, 2^28851880 is an apocalyptic number.

28851880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28851880 is an abundant number, since it is smaller than the sum of its proper divisors (39483320).

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

28851880 is a wasteful number, since it uses less digits than its factorization.

28851880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37993 (or 37989 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 40.

The square root of 28851880 is about 5371.3946047558. The cubic root of 28851880 is about 306.7077187219.

The spelling of 28851880 in words is "twenty-eight million, eight hundred fifty-one thousand, eight hundred eighty".