22772140 has 24 divisors (see below), whose sum is σ = 48176352. Its totient is φ = 9041280.

The previous prime is 22772137. The next prime is 22772149. The reversal of 22772140 is 4127722.

It is not an unprimeable number, because it can be changed into a prime (22772149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416 + ... + 6895.

It is an arithmetic number, because the mean of its divisors is an integer number (2007348).

Almost surely, 2^22772140 is an apocalyptic number.

22772140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22772140 is an abundant number, since it is smaller than the sum of its proper divisors (25404212).

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

22772140 is a wasteful number, since it uses less digits than its factorization.

22772140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8457 (or 8455 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 22772140 is about 4772.0163453199. The cubic root of 22772140 is about 283.4444439265. Note that the first 5 decimals are identical.

Adding to 22772140 its reverse (4127722), we get a palindrome (26899862).

The spelling of 22772140 in words is "twenty-two million, seven hundred seventy-two thousand, one hundred forty".