28404322 has 8 divisors (see below), whose sum is σ = 42665472. Its totient is φ = 14182500.

The previous prime is 28404319. The next prime is 28404329. The reversal of 28404322 is 22340482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28404329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7954 + ... + 10957.

It is an arithmetic number, because the mean of its divisors is an integer number (5333184).

Almost surely, 2^28404322 is an apocalyptic number.

28404322 is a deficient number, since it is larger than the sum of its proper divisors (14261150).

28404322 is a wasteful number, since it uses less digits than its factorization.

28404322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19664.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 28404322 is about 5329.5705267873. The cubic root of 28404322 is about 305.1135365178.

The spelling of 28404322 in words is "twenty-eight million, four hundred four thousand, three hundred twenty-two".