22400642 has 16 divisors (see below), whose sum is σ = 37174464. Its totient is φ = 10038000.

The previous prime is 22400627. The next prime is 22400647. The reversal of 22400642 is 24600422.

It is not an unprimeable number, because it can be changed into a prime (22400647) 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, 5609 + ... + 8732.

It is an arithmetic number, because the mean of its divisors is an integer number (2323404).

Almost surely, 2^22400642 is an apocalyptic number.

22400642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

22400642 is a deficient number, since it is larger than the sum of its proper divisors (14773822).

22400642 is a wasteful number, since it uses less digits than its factorization.

22400642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14425.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22400642 is about 4732.9316496227. The cubic root of 22400642 is about 281.8946423317.

The spelling of 22400642 in words is "twenty-two million, four hundred thousand, six hundred forty-two".