22609778 has 8 divisors (see below), whose sum is σ = 34741980. Its totient is φ = 11029120.

The previous prime is 22609771. The next prime is 22609789. The reversal of 22609778 is 87790622.

It can be written as a sum of positive squares in 2 ways, for example, as 22591009 + 18769 = 4753^2 + 137^2 .

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

It is a super-2 number, since 2×22609778² = 1022404122418568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (22609771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137783 + ... + 137946.

Almost surely, 2^22609778 is an apocalyptic number.

22609778 is a deficient number, since it is larger than the sum of its proper divisors (12132202).

22609778 is a wasteful number, since it uses less digits than its factorization.

22609778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275772.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 22609778 is about 4754.9740272687. The cubic root of 22609778 is about 282.7691975438.

The spelling of 22609778 in words is "twenty-two million, six hundred nine thousand, seven hundred seventy-eight".