28487555 has 16 divisors (see below), whose sum is σ = 36352800. Its totient is φ = 21369600.

The previous prime is 28487551. The next prime is 28487587. The reversal of 28487555 is 55578482.

It is not a de Polignac number, because 28487555 - 2² = 28487551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28487551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8111 + ... + 11079.

It is an arithmetic number, because the mean of its divisors is an integer number (2272050).

Almost surely, 2^28487555 is an apocalyptic number.

28487555 is a deficient number, since it is larger than the sum of its proper divisors (7865245).

28487555 is a wasteful number, since it uses less digits than its factorization.

28487555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094.

The product of its digits is 448000, while the sum is 44.

The square root of 28487555 is about 5337.3734177028. The cubic root of 28487555 is about 305.4112699619.

The spelling of 28487555 in words is "twenty-eight million, four hundred eighty-seven thousand, five hundred fifty-five".