22400842 has 8 divisors (see below), whose sum is σ = 34420932. Its totient is φ = 10927200.

The previous prime is 22400837. The next prime is 22400843. The reversal of 22400842 is 24800422.

It can be written as a sum of positive squares in 2 ways, for example, as 19193161 + 3207681 = 4381^2 + 1791^2 .

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 (22400843) 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, 136509 + ... + 136672.

Almost surely, 2^22400842 is an apocalyptic number.

22400842 is a deficient number, since it is larger than the sum of its proper divisors (12020090).

22400842 is a wasteful number, since it uses less digits than its factorization.

22400842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273224.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 22400842 is about 4732.9527781291. The cubic root of 22400842 is about 281.8954812773.

The spelling of 22400842 in words is "twenty-two million, four hundred thousand, eight hundred forty-two".