28828886 has 4 divisors (see below), whose sum is σ = 43243332. Its totient is φ = 14414442.

The previous prime is 28828861. The next prime is 28828901. The reversal of 28828886 is 68882882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68882882 = 2 ⋅34441441.

It is a super-2 number, since 2×28828886² = 1662209336001992, 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 as a sum of consecutive naturals, namely, 7207220 + ... + 7207223.

It is an arithmetic number, because the mean of its divisors is an integer number (10810833).

Almost surely, 2^28828886 is an apocalyptic number.

28828886 is a deficient number, since it is larger than the sum of its proper divisors (14414446).

28828886 is a wasteful number, since it uses less digits than its factorization.

28828886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14414445.

The product of its digits is 786432, while the sum is 50.

The square root of 28828886 is about 5369.2537656550. The cubic root of 28828886 is about 306.6262184103.

The spelling of 28828886 in words is "twenty-eight million, eight hundred twenty-eight thousand, eight hundred eighty-six".