22027978 has 16 divisors (see below), whose sum is σ = 37946304. Its totient is φ = 9394560.

The previous prime is 22027939. The next prime is 22027981. The reversal of 22027978 is 87972022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (2371644).

Almost surely, 2^22027978 is an apocalyptic number.

22027978 is a deficient number, since it is larger than the sum of its proper divisors (15918326).

22027978 is a wasteful number, since it uses less digits than its factorization.

22027978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7677.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 22027978 is about 4693.3972770265. The cubic root of 22027978 is about 280.3226637433.

It can be divided in two parts, 22027 and 978, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 22027978 in words is "twenty-two million, twenty-seven thousand, nine hundred seventy-eight".