22740887 has 16 divisors (see below), whose sum is σ = 25659648. Its totient is φ = 20010240.

The previous prime is 22740881. The next prime is 22740889. The reversal of 22740887 is 78804722.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22740887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22740887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22740881) 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, 29033 + ... + 29805.

It is an arithmetic number, because the mean of its divisors is an integer number (1603728).

Almost surely, 2^22740887 is an apocalyptic number.

22740887 is a deficient number, since it is larger than the sum of its proper divisors (2918761).

22740887 is a wasteful number, since it uses less digits than its factorization.

22740887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 22740887 is about 4768.7406094272. The cubic root of 22740887 is about 283.3147160393.

It can be divided in two parts, 227 and 40887, that added together give a palindrome (41114).

The spelling of 22740887 in words is "twenty-two million, seven hundred forty thousand, eight hundred eighty-seven".