28627715 has 4 divisors (see below), whose sum is σ = 34353264. Its totient is φ = 22902168.

The previous prime is 28627691. The next prime is 28627721. The reversal of 28627715 is 51772682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28627715 - 2¹⁶ = 28562179 is a prime.

It is a super-2 number, since 2×28627715² = 1639092132242450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2862767 + ... + 2862776.

It is an arithmetic number, because the mean of its divisors is an integer number (8588316).

Almost surely, 2^28627715 is an apocalyptic number.

28627715 is a deficient number, since it is larger than the sum of its proper divisors (5725549).

28627715 is an equidigital number, since it uses as much as digits as its factorization.

28627715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725548.

The product of its digits is 47040, while the sum is 38.

The square root of 28627715 is about 5350.4873609794. The cubic root of 28627715 is about 305.9113296274.

The spelling of 28627715 in words is "twenty-eight million, six hundred twenty-seven thousand, seven hundred fifteen".