28188854 has 4 divisors (see below), whose sum is σ = 42283284. Its totient is φ = 14094426.

The previous prime is 28188851. The next prime is 28188887. The reversal of 28188854 is 45888182.

It is a happy number.

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

It is a super-2 number, since 2×28188854² = 1589222979666632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28188851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7047212 + ... + 7047215.

It is an arithmetic number, because the mean of its divisors is an integer number (10570821).

Almost surely, 2^28188854 is an apocalyptic number.

28188854 is a deficient number, since it is larger than the sum of its proper divisors (14094430).

28188854 is a wasteful number, since it uses less digits than its factorization.

28188854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14094429.

The product of its digits is 163840, while the sum is 44.

The square root of 28188854 is about 5309.3176586074. The cubic root of 28188854 is about 304.3400727448.

The spelling of 28188854 in words is "twenty-eight million, one hundred eighty-eight thousand, eight hundred fifty-four".