28684627 has 4 divisors (see below), whose sum is σ = 30371976. Its totient is φ = 26997280.

The previous prime is 28684619. The next prime is 28684633. The reversal of 28684627 is 72648682.

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 28684627 - 2³ = 28684619 is a prime.

It is a super-2 number, since 2×28684627² = 1645615652258258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28684637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843649 + ... + 843682.

It is an arithmetic number, because the mean of its divisors is an integer number (7592994).

Almost surely, 2^28684627 is an apocalyptic number.

28684627 is a deficient number, since it is larger than the sum of its proper divisors (1687349).

28684627 is a wasteful number, since it uses less digits than its factorization.

28684627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687348.

The product of its digits is 258048, while the sum is 43.

The square root of 28684627 is about 5355.8031143798. The cubic root of 28684627 is about 306.1139130476.

The spelling of 28684627 in words is "twenty-eight million, six hundred eighty-four thousand, six hundred twenty-seven".