28813668 has 24 divisors (see below), whose sum is σ = 72403968. Its totient is φ = 8865696.

The previous prime is 28813627. The next prime is 28813723. The reversal of 28813668 is 86631882.

It is a super-2 number, since 2×28813668² = 1660454927228448, which contains 22 as substring.

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, 92196 + ... + 92507.

It is an arithmetic number, because the mean of its divisors is an integer number (3016832).

Almost surely, 2^28813668 is an apocalyptic number.

It is an amenable number.

28813668 is an abundant number, since it is smaller than the sum of its proper divisors (43590300).

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

28813668 is a wasteful number, since it uses less digits than its factorization.

28813668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184723 (or 184721 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 28813668 is about 5367.8364356601. The cubic root of 28813668 is about 306.5722556465.

The spelling of 28813668 in words is "twenty-eight million, eight hundred thirteen thousand, six hundred sixty-eight".