28749560 has 32 divisors (see below), whose sum is σ = 73928160. Its totient is φ = 9856896.

The previous prime is 28749557. The next prime is 28749583. The reversal of 28749560 is 6594782.

It is a Smith number, since the sum of its digits (41) 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 7 ways as a sum of consecutive naturals, for example, 51059 + ... + 51618.

It is an arithmetic number, because the mean of its divisors is an integer number (2310255).

Almost surely, 2^28749560 is an apocalyptic number.

28749560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28749560 is an abundant number, since it is smaller than the sum of its proper divisors (45178600).

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

28749560 is a wasteful number, since it uses less digits than its factorization.

28749560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102695 (or 102691 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 28749560 is about 5361.8616170133. The cubic root of 28749560 is about 306.3447209434.

The spelling of 28749560 in words is "twenty-eight million, seven hundred forty-nine thousand, five hundred sixty".