28627818 has 16 divisors (see below), whose sum is σ = 59102976. Its totient is φ = 9234720.

The previous prime is 28627811. The next prime is 28627871. The reversal of 28627818 is 81872682.

It is a super-2 number, since 2×28627818² = 1639103926882248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28627818.

It is not an unprimeable number, because it can be changed into a prime (28627811) 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, 76771 + ... + 77142.

It is an arithmetic number, because the mean of its divisors is an integer number (3693936).

Almost surely, 2^28627818 is an apocalyptic number.

28627818 is an abundant number, since it is smaller than the sum of its proper divisors (30475158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28627818 is a wasteful number, since it uses less digits than its factorization.

28627818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153949.

The product of its digits is 86016, while the sum is 42.

The square root of 28627818 is about 5350.4969862621. The cubic root of 28627818 is about 305.9116965077.

The spelling of 28627818 in words is "twenty-eight million, six hundred twenty-seven thousand, eight hundred eighteen".