28773560 has 32 divisors (see below), whose sum is σ = 64929600. Its totient is φ = 11475840.

The previous prime is 28773553. The next prime is 28773601. The reversal of 28773560 is 6537782.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 16406 + ... + 18074.

It is an arithmetic number, because the mean of its divisors is an integer number (2029050).

Almost surely, 2^28773560 is an apocalyptic number.

28773560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28773560 is an abundant number, since it is smaller than the sum of its proper divisors (36156040).

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

28773560 is a wasteful number, since it uses less digits than its factorization.

28773560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 28773560 is about 5364.0991787997. The cubic root of 28773560 is about 306.4299422867.

The spelling of 28773560 in words is "twenty-eight million, seven hundred seventy-three thousand, five hundred sixty".