22489978 has 8 divisors (see below), whose sum is σ = 38554272. Its totient is φ = 9638556.

The previous prime is 22489937. The next prime is 22489979. The reversal of 22489978 is 87998422.

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

It is a super-2 number, since 2×22489978² = 1011598220880968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22489979) 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, 803200 + ... + 803227.

It is an arithmetic number, because the mean of its divisors is an integer number (4819284).

Almost surely, 2^22489978 is an apocalyptic number.

22489978 is a deficient number, since it is larger than the sum of its proper divisors (16064294).

22489978 is a wasteful number, since it uses less digits than its factorization.

22489978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606436.

The product of its digits is 580608, while the sum is 49.

The square root of 22489978 is about 4742.3599610321. The cubic root of 22489978 is about 282.2688866034.

It can be divided in two parts, 22 and 489978, that added together give a square (490000 = 700²).

The spelling of 22489978 in words is "twenty-two million, four hundred eighty-nine thousand, nine hundred seventy-eight".