28687480 has 32 divisors (see below), whose sum is σ = 64728000. Its totient is φ = 11442816.

The previous prime is 28687447. The next prime is 28687481. The reversal of 28687480 is 8478682.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28687481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17746 + ... + 19294.

It is an arithmetic number, because the mean of its divisors is an integer number (2022750).

Almost surely, 2^28687480 is an apocalyptic number.

28687480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28687480 is an abundant number, since it is smaller than the sum of its proper divisors (36040520).

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

28687480 is a wasteful number, since it uses less digits than its factorization.

28687480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023 (or 2019 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 28687480 is about 5356.0694543667. The cubic root of 28687480 is about 306.1240615038.

The spelling of 28687480 in words is "twenty-eight million, six hundred eighty-seven thousand, four hundred eighty".