22261764 has 24 divisors (see below), whose sum is σ = 59364928. Its totient is φ = 6360480.

The previous prime is 22261741. The next prime is 22261783. The reversal of 22261764 is 46716222.

It is a super-2 number, since 2×22261764² = 991172272783392, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132427 + ... + 132594.

Almost surely, 2^22261764 is an apocalyptic number.

It is an amenable number.

22261764 is an abundant number, since it is smaller than the sum of its proper divisors (37103164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22261764 is a wasteful number, since it uses less digits than its factorization.

22261764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265035 (or 265033 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 22261764 is about 4718.2373827522. The cubic root of 22261764 is about 281.3108770937.

Adding to 22261764 its reverse (46716222), we get a palindrome (68977986).

The spelling of 22261764 in words is "twenty-two million, two hundred sixty-one thousand, seven hundred sixty-four".