28872487 has 16 divisors (see below), whose sum is σ = 34977600. Its totient is φ = 23304960.

The previous prime is 28872461. The next prime is 28872497. The reversal of 28872487 is 78427882.

It is not a de Polignac number, because 28872487 - 2⁷ = 28872359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28872427) 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, 6589 + ... + 10057.

It is an arithmetic number, because the mean of its divisors is an integer number (2186100).

Almost surely, 2^28872487 is an apocalyptic number.

28872487 is a deficient number, since it is larger than the sum of its proper divisors (6105113).

28872487 is a wasteful number, since it uses less digits than its factorization.

28872487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546.

The product of its digits is 401408, while the sum is 46.

The square root of 28872487 is about 5373.3124792813. The cubic root of 28872487 is about 306.7807217270.

The spelling of 28872487 in words is "twenty-eight million, eight hundred seventy-two thousand, four hundred eighty-seven".