22427978 has 8 divisors (see below), whose sum is σ = 33757668. Its totient is φ = 11175424.

The previous prime is 22427969. The next prime is 22427987. The reversal of 22427978 is 87972422.

It is an interprime number because it is at equal distance from previous prime (22427969) and next prime (22427987).

It can be written as a sum of positive squares in 2 ways, for example, as 17197609 + 5230369 = 4147^2 + 2287^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18551 + ... + 19722.

Almost surely, 2^22427978 is an apocalyptic number.

22427978 is a deficient number, since it is larger than the sum of its proper divisors (11329690).

22427978 is a wasteful number, since it uses less digits than its factorization.

22427978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38568.

The product of its digits is 112896, while the sum is 41.

The square root of 22427978 is about 4735.8186198375. The cubic root of 22427978 is about 282.0092631466.

The spelling of 22427978 in words is "twenty-two million, four hundred twenty-seven thousand, nine hundred seventy-eight".