22781090 has 8 divisors (see below), whose sum is σ = 41005980. Its totient is φ = 9112432.

The previous prime is 22781089. The next prime is 22781107. The reversal of 22781090 is 9018722.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20313049 + 2468041 = 4507^2 + 1571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 1139045 + ... + 1139064.

Almost surely, 2^22781090 is an apocalyptic number.

22781090 is a deficient number, since it is larger than the sum of its proper divisors (18224890).

22781090 is a wasteful number, since it uses less digits than its factorization.

22781090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278116.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 22781090 is about 4772.9540119301. The cubic root of 22781090 is about 283.4815725627.

The spelling of 22781090 in words is "twenty-two million, seven hundred eighty-one thousand, ninety".