28422120 has 64 divisors (see below), whose sum is σ = 85619520. Its totient is φ = 7547904.

The previous prime is 28422109. The next prime is 28422127. The reversal of 28422120 is 2122482.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28422127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51687 + ... + 52233.

It is an arithmetic number, because the mean of its divisors is an integer number (1337805).

Almost surely, 2^28422120 is an apocalyptic number.

28422120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28422120 is an abundant number, since it is smaller than the sum of its proper divisors (57197400).

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

28422120 is a wasteful number, since it uses less digits than its factorization.

28422120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 990 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 28422120 is about 5331.2400058523. The cubic root of 28422120 is about 305.1772507287.

The spelling of 28422120 in words is "twenty-eight million, four hundred twenty-two thousand, one hundred twenty".