28442886 has 16 divisors (see below), whose sum is σ = 59880000. Its totient is φ = 8981928.

The previous prime is 28442879. The next prime is 28442893. The reversal of 28442886 is 68824482.

It is an interprime number because it is at equal distance from previous prime (28442879) and next prime (28442893).

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, 124636 + ... + 124863.

It is an arithmetic number, because the mean of its divisors is an integer number (3742500).

Almost surely, 2^28442886 is an apocalyptic number.

28442886 is an abundant number, since it is smaller than the sum of its proper divisors (31437114).

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

28442886 is a wasteful number, since it uses less digits than its factorization.

28442886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249523.

The product of its digits is 196608, while the sum is 42.

The square root of 28442886 is about 5333.1872271654. The cubic root of 28442886 is about 305.2515563284.

The spelling of 28442886 in words is "twenty-eight million, four hundred forty-two thousand, eight hundred eighty-six".