28768980 has 48 divisors (see below), whose sum is σ = 82736640. Its totient is φ = 7463808.

The previous prime is 28768979. The next prime is 28768991. The reversal of 28768980 is 8986782.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 4260 + ... + 8699.

It is an arithmetic number, because the mean of its divisors is an integer number (1723680).

Almost surely, 2^28768980 is an apocalyptic number.

28768980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28768980 is an abundant number, since it is smaller than the sum of its proper divisors (53967660).

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

28768980 is a wasteful number, since it uses less digits than its factorization.

28768980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13008 (or 13006 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 28768980 is about 5363.6722494947. The cubic root of 28768980 is about 306.4136828735.

The spelling of 28768980 in words is "twenty-eight million, seven hundred sixty-eight thousand, nine hundred eighty".