28587507 has 16 divisors (see below), whose sum is σ = 41233920. Its totient is φ = 17512992.

The previous prime is 28587499. The next prime is 28587509. The reversal of 28587507 is 70578582.

It is a happy number.

It is not a de Polignac number, because 28587507 - 2³ = 28587499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28587509) 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, 7788 + ... + 10854.

It is an arithmetic number, because the mean of its divisors is an integer number (2577120).

Almost surely, 2^28587507 is an apocalyptic number.

28587507 is a deficient number, since it is larger than the sum of its proper divisors (12646413).

28587507 is a wasteful number, since it uses less digits than its factorization.

28587507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 28587507 is about 5346.7286259918. The cubic root of 28587507 is about 305.7680437035.

The spelling of 28587507 in words is "twenty-eight million, five hundred eighty-seven thousand, five hundred seven".