28687507 has 8 divisors (see below), whose sum is σ = 29531840. Its totient is φ = 27855360.

The previous prime is 28687501. The next prime is 28687523. The reversal of 28687507 is 70578682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28687507 - 2³ = 28687499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28687501) 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, 1843 + ... + 7795.

It is an arithmetic number, because the mean of its divisors is an integer number (3691480).

Almost surely, 2^28687507 is an apocalyptic number.

28687507 is a deficient number, since it is larger than the sum of its proper divisors (844333).

28687507 is an equidigital number, since it uses as much as digits as its factorization.

28687507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6093.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 28687507 is about 5356.0719748711. The cubic root of 28687507 is about 306.1241575428.

The spelling of 28687507 in words is "twenty-eight million, six hundred eighty-seven thousand, five hundred seven".