22891378 has 4 divisors (see below), whose sum is σ = 34337070. Its totient is φ = 11445688.

The previous prime is 22891357. The next prime is 22891381. The reversal of 22891378 is 87319822.

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., 22686169 + 205209 = 4763^2 + 453^2 .

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 22891378.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5722843 + ... + 5722846.

Almost surely, 2^22891378 is an apocalyptic number.

22891378 is a deficient number, since it is larger than the sum of its proper divisors (11445692).

22891378 is a wasteful number, since it uses less digits than its factorization.

22891378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445691.

The product of its digits is 48384, while the sum is 40.

The square root of 22891378 is about 4784.4934946136. The cubic root of 22891378 is about 283.9383007540.

The spelling of 22891378 in words is "twenty-two million, eight hundred ninety-one thousand, three hundred seventy-eight".