28878960 has 80 divisors (see below), whose sum is σ = 97672320. Its totient is φ = 7000320.

The previous prime is 28878953. The next prime is 28878989. The reversal of 28878960 is 6987882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2830 + ... + 8109.

It is an arithmetic number, because the mean of its divisors is an integer number (1220904).

Almost surely, 2^28878960 is an apocalyptic number.

28878960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28878960 is an abundant number, since it is smaller than the sum of its proper divisors (68793360).

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

28878960 is a wasteful number, since it uses less digits than its factorization.

28878960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10966 (or 10960 counting only the distinct ones).

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

The square root of 28878960 is about 5373.9147741660. The cubic root of 28878960 is about 306.8036460105.

The spelling of 28878960 in words is "twenty-eight million, eight hundred seventy-eight thousand, nine hundred sixty".