22040577 has 24 divisors (see below), whose sum is σ = 34465704. Its totient is φ = 13492224.

The previous prime is 22040573. The next prime is 22040593. The reversal of 22040577 is 77504022.

It can be written as a sum of positive squares in 4 ways, for example, as 12362256 + 9678321 = 3516^2 + 3111^2 .

It is not a de Polignac number, because 22040577 - 2² = 22040573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22040577.

It is not an unprimeable number, because it can be changed into a prime (22040573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29703 + ... + 30435.

It is an arithmetic number, because the mean of its divisors is an integer number (1436071).

Almost surely, 2^22040577 is an apocalyptic number.

It is an amenable number.

22040577 is a deficient number, since it is larger than the sum of its proper divisors (12425127).

22040577 is a wasteful number, since it uses less digits than its factorization.

22040577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 22040577 is about 4694.7392898861. The cubic root of 22040577 is about 280.3760974888.

Adding to 22040577 its reverse (77504022), we get a palindrome (99544599).

The spelling of 22040577 in words is "twenty-two million, forty thousand, five hundred seventy-seven".