22400042 has 16 divisors (see below), whose sum is σ = 39639552. Its totient is φ = 9290160.

The previous prime is 22400041. The next prime is 22400051. The reversal of 22400042 is 24000422.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (22400041) 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, 25373 + ... + 26240.

It is an arithmetic number, because the mean of its divisors is an integer number (2477472).

Almost surely, 2^22400042 is an apocalyptic number.

22400042 is a deficient number, since it is larger than the sum of its proper divisors (17239510).

22400042 is a wasteful number, since it uses less digits than its factorization.

22400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51653.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 22400042 is about 4732.8682635375. The cubic root of 22400042 is about 281.8921254650.

Adding to 22400042 its reverse (24000422), we get a palindrome (46400464).

It can be divided in two parts, 2 and 2400042, that multiplied together give a palindrome (4800084).

The spelling of 22400042 in words is "twenty-two million, four hundred thousand, forty-two".