22540406 has 32 divisors (see below), whose sum is σ = 40061952. Its totient is φ = 9311040.

The previous prime is 22540387. The next prime is 22540409. The reversal of 22540406 is 60404522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22540409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61235 + ... + 61601.

It is an arithmetic number, because the mean of its divisors is an integer number (1251936).

Almost surely, 2^22540406 is an apocalyptic number.

22540406 is a deficient number, since it is larger than the sum of its proper divisors (17521546).

22540406 is a wasteful number, since it uses less digits than its factorization.

22540406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 22540406 is about 4747.6737461624. The cubic root of 22540406 is about 282.4797009457.

Adding to 22540406 its reverse (60404522), we get a palindrome (82944928).

The spelling of 22540406 in words is "twenty-two million, five hundred forty thousand, four hundred six".