22906978 has 4 divisors (see below), whose sum is σ = 34360470. Its totient is φ = 11453488.

The previous prime is 22906967. The next prime is 22906979. The reversal of 22906978 is 87960922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16621929 + 6285049 = 4077^2 + 2507^2 .

It is a super-3 number, since 3×22906978³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22906979) by changing a digit.

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 as a sum of consecutive naturals, namely, 5726743 + ... + 5726746.

Almost surely, 2^22906978 is an apocalyptic number.

22906978 is a deficient number, since it is larger than the sum of its proper divisors (11453492).

22906978 is a wasteful number, since it uses less digits than its factorization.

22906978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11453491.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 22906978 is about 4786.1234835721. The cubic root of 22906978 is about 284.0027854650.

The spelling of 22906978 in words is "twenty-two million, nine hundred six thousand, nine hundred seventy-eight".