28502647 has 6 divisors (see below), whose sum is σ = 28874328. Its totient is φ = 28135692.

The previous prime is 28502611. The next prime is 28502687. The reversal of 28502647 is 74620582.

It is not a de Polignac number, because 28502647 - 2¹⁵ = 28469879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3958 + ... + 8524.

It is an arithmetic number, because the mean of its divisors is an integer number (4812388).

Almost surely, 2^28502647 is an apocalyptic number.

28502647 is a deficient number, since it is larger than the sum of its proper divisors (371681).

28502647 is an frugal number, since it uses more digits than its factorization.

28502647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725 (or 4646 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28502647 is about 5338.7870345239. The cubic root of 28502647 is about 305.4651935455.

The spelling of 28502647 in words is "twenty-eight million, five hundred two thousand, six hundred forty-seven".