22988978 has 4 divisors (see below), whose sum is σ = 34483470. Its totient is φ = 11494488.

The previous prime is 22988957. The next prime is 22988989. The reversal of 22988978 is 87988922.

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., 22972849 + 16129 = 4793^2 + 127^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5747243 + ... + 5747246.

Almost surely, 2^22988978 is an apocalyptic number.

22988978 is a deficient number, since it is larger than the sum of its proper divisors (11494492).

22988978 is a wasteful number, since it uses less digits than its factorization.

22988978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494491.

The product of its digits is 1161216, while the sum is 53.

The square root of 22988978 is about 4794.6822626739. The cubic root of 22988978 is about 284.3412630428.

The spelling of 22988978 in words is "twenty-two million, nine hundred eighty-eight thousand, nine hundred seventy-eight".