22890146 has 4 divisors (see below), whose sum is σ = 34335222. Its totient is φ = 11445072.

The previous prime is 22890113. The next prime is 22890151. The reversal of 22890146 is 64109822.

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., 20151121 + 2739025 = 4489^2 + 1655^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5722535 + ... + 5722538.

Almost surely, 2^22890146 is an apocalyptic number.

22890146 is a deficient number, since it is larger than the sum of its proper divisors (11445076).

22890146 is a wasteful number, since it uses less digits than its factorization.

22890146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445075.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 22890146 is about 4784.3647436206. The cubic root of 22890146 is about 283.9332068672.

Adding to 22890146 its reverse (64109822), we get a palindrome (86999968).

The spelling of 22890146 in words is "twenty-two million, eight hundred ninety thousand, one hundred forty-six".