22404397 has 8 divisors (see below), whose sum is σ = 22708800. Its totient is φ = 22102080.

The previous prime is 22404391. The next prime is 22404427. The reversal of 22404397 is 79340422.

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

It is a cyclic number.

It is not a de Polignac number, because 22404397 - 2²³ = 14015789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37104 + ... + 37702.

It is an arithmetic number, because the mean of its divisors is an integer number (2838600).

Almost surely, 2^22404397 is an apocalyptic number.

It is an amenable number.

22404397 is a deficient number, since it is larger than the sum of its proper divisors (304403).

22404397 is a wasteful number, since it uses less digits than its factorization.

22404397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 22404397 is about 4733.3283215936. The cubic root of 22404397 is about 281.9103927024.

It can be divided in two parts, 22404 and 397, that added together give a square (22801 = 151²).

The spelling of 22404397 in words is "twenty-two million, four hundred four thousand, three hundred ninety-seven".