22750978 has 4 divisors (see below), whose sum is σ = 34126470. Its totient is φ = 11375488.

The previous prime is 22750963. The next prime is 22751009. The reversal of 22750978 is 87905722.

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., 18722929 + 4028049 = 4327^2 + 2007^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 22750978.

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 as a sum of consecutive naturals, namely, 5687743 + ... + 5687746.

Almost surely, 2^22750978 is an apocalyptic number.

22750978 is a deficient number, since it is larger than the sum of its proper divisors (11375492).

22750978 is a wasteful number, since it uses less digits than its factorization.

22750978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11375491.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 22750978 is about 4769.7985282400. The cubic root of 22750978 is about 283.3566156954.

The spelling of 22750978 in words is "twenty-two million, seven hundred fifty thousand, nine hundred seventy-eight".