28987560 has 96 divisors (see below), whose sum is σ = 107677440. Its totient is φ = 6625152.

The previous prime is 28987537. The next prime is 28987603. The reversal of 28987560 is 6578982.

28987560 is a `hidden beast` number, since 2 + 8 + 9 + 87 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 3232 + ... + 8271.

It is an arithmetic number, because the mean of its divisors is an integer number (1121640).

Almost surely, 2^28987560 is an apocalyptic number.

28987560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28987560 is an abundant number, since it is smaller than the sum of its proper divisors (78689880).

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

28987560 is a wasteful number, since it uses less digits than its factorization.

28987560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11527 (or 11520 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28987560 is about 5384.0096582380. The cubic root of 28987560 is about 307.1877456863.

The spelling of 28987560 in words is "twenty-eight million, nine hundred eighty-seven thousand, five hundred sixty".