28880886 has 16 divisors (see below), whose sum is σ = 58624704. Its totient is φ = 9483144.

The previous prime is 28880869. The next prime is 28880911. The reversal of 28880886 is 68808882.

It is a super-2 number, since 2×28880886² = 1668211152289992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35520 + ... + 36323.

It is an arithmetic number, because the mean of its divisors is an integer number (3664044).

Almost surely, 2^28880886 is an apocalyptic number.

28880886 is an abundant number, since it is smaller than the sum of its proper divisors (29743818).

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

28880886 is a wasteful number, since it uses less digits than its factorization.

28880886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71915.

The product of its (nonzero) digits is 393216, while the sum is 48.

The square root of 28880886 is about 5374.0939701498. The cubic root of 28880886 is about 306.8104663240.

It can be divided in two parts, 2 and 8880886, that added together give a palindrome (8880888).

The spelling of 28880886 in words is "twenty-eight million, eight hundred eighty thousand, eight hundred eighty-six".