28018422 has 24 divisors (see below), whose sum is σ = 61541064. Its totient is φ = 9211104.

The previous prime is 28018387. The next prime is 28018423. The reversal of 28018422 is 22481082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28018423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9348 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (2564211).

Almost surely, 2^28018422 is an apocalyptic number.

28018422 is an abundant number, since it is smaller than the sum of its proper divisors (33522642).

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

28018422 is a wasteful number, since it uses less digits than its factorization.

28018422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21404 (or 21401 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28018422 is about 5293.2430512872. The cubic root of 28018422 is about 303.7254778761.

The spelling of 28018422 in words is "twenty-eight million, eighteen thousand, four hundred twenty-two".