28406322 has 32 divisors (see below), whose sum is σ = 72144000. Its totient is φ = 8115984.

The previous prime is 28406309. The next prime is 28406327. The reversal of 28406322 is 22360482.

28406322 is a `hidden beast` number, since 28 + 4 + 0 + 632 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28406327) 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, 37197 + ... + 37952.

It is an arithmetic number, because the mean of its divisors is an integer number (2254500).

Almost surely, 2^28406322 is an apocalyptic number.

28406322 is an abundant number, since it is smaller than the sum of its proper divisors (43737678).

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

28406322 is a wasteful number, since it uses less digits than its factorization.

28406322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75167 (or 75161 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 28406322 is about 5329.7581558641. The cubic root of 28406322 is about 305.1206975495.

The spelling of 28406322 in words is "twenty-eight million, four hundred six thousand, three hundred twenty-two".