28687560 has 128 divisors (see below), whose sum is σ = 95247360. Its totient is φ = 6854400.

The previous prime is 28687553. The next prime is 28687567. The reversal of 28687560 is 6578682.

It is an interprime number because it is at equal distance from previous prime (28687553) and next prime (28687567).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28687567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135855 + ... + 136065.

It is an arithmetic number, because the mean of its divisors is an integer number (744120).

Almost surely, 2^28687560 is an apocalyptic number.

28687560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28687560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47623680).

28687560 is an abundant number, since it is smaller than the sum of its proper divisors (66559800).

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

28687560 is a wasteful number, since it uses less digits than its factorization.

28687560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 28687560 is about 5356.0769225245. The cubic root of 28687560 is about 306.1243460635.

The spelling of 28687560 in words is "twenty-eight million, six hundred eighty-seven thousand, five hundred sixty".