22042730 has 8 divisors (see below), whose sum is σ = 39676932. Its totient is φ = 8817088.

The previous prime is 22042711. The next prime is 22042739. The reversal of 22042730 is 3724022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22005481 + 37249 = 4691^2 + 193^2 .

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 (22042739) 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, 1102127 + ... + 1102146.

Almost surely, 2^22042730 is an apocalyptic number.

22042730 is a deficient number, since it is larger than the sum of its proper divisors (17634202).

22042730 is a wasteful number, since it uses less digits than its factorization.

22042730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204280.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 22042730 is about 4694.9685834945. The cubic root of 22042730 is about 280.3852265614.

Adding to 22042730 its reverse (3724022), we get a palindrome (25766752).

The spelling of 22042730 in words is "twenty-two million, forty-two thousand, seven hundred thirty".