28638662 has 16 divisors (see below), whose sum is σ = 48698160. Its totient is φ = 12521952.

The previous prime is 28638647. The next prime is 28638679. The reversal of 28638662 is 26683682.

It is a super-2 number, since 2×28638662² = 1640345922300488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28493 + ... + 29480.

It is an arithmetic number, because the mean of its divisors is an integer number (3043635).

Almost surely, 2^28638662 is an apocalyptic number.

28638662 is a deficient number, since it is larger than the sum of its proper divisors (20059498).

28638662 is a wasteful number, since it uses less digits than its factorization.

28638662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58007.

The product of its digits is 165888, while the sum is 41.

The square root of 28638662 is about 5351.5102541245. The cubic root of 28638662 is about 305.9503173073.

The spelling of 28638662 in words is "twenty-eight million, six hundred thirty-eight thousand, six hundred sixty-two".