22140460 has 24 divisors (see below), whose sum is σ = 49230720. Its totient is φ = 8335104.

The previous prime is 22140449. The next prime is 22140493. The reversal of 22140460 is 6404122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32220 + ... + 32899.

It is an arithmetic number, because the mean of its divisors is an integer number (2051280).

Almost surely, 2^22140460 is an apocalyptic number.

22140460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22140460 is an abundant number, since it is smaller than the sum of its proper divisors (27090260).

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

22140460 is a wasteful number, since it uses less digits than its factorization.

22140460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65145 (or 65143 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 22140460 is about 4705.3650230349. The cubic root of 22140460 is about 280.7989933758.

Adding to 22140460 its reverse (6404122), we get a palindrome (28544582).

The spelling of 22140460 in words is "twenty-two million, one hundred forty thousand, four hundred sixty".