22761140 has 12 divisors (see below), whose sum is σ = 47798436. Its totient is φ = 9104448.

The previous prime is 22761133. The next prime is 22761149. The reversal of 22761140 is 4116722.

It can be written as a sum of positive squares in 2 ways, for example, as 5885476 + 16875664 = 2426^2 + 4108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22761149) 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, 569009 + ... + 569048.

It is an arithmetic number, because the mean of its divisors is an integer number (3983203).

Almost surely, 2^22761140 is an apocalyptic number.

22761140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22761140 is an abundant number, since it is smaller than the sum of its proper divisors (25037296).

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

22761140 is a wasteful number, since it uses less digits than its factorization.

22761140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138066 (or 1138064 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 22761140 is about 4770.8636534699. The cubic root of 22761140 is about 283.3987976376.

Adding to 22761140 its reverse (4116722), we get a palindrome (26877862).

The spelling of 22761140 in words is "twenty-two million, seven hundred sixty-one thousand, one hundred forty".