22142780 has 24 divisors (see below), whose sum is σ = 50727600. Its totient is φ = 8051840.

The previous prime is 22142749. The next prime is 22142797. The reversal of 22142780 is 8724122.

It is a super-2 number, since 2×22142780² = 980605412256800, which contains 22 as substring.

It is a congruent number.

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, 50105 + ... + 50544.

It is an arithmetic number, because the mean of its divisors is an integer number (2113650).

Almost surely, 2^22142780 is an apocalyptic number.

22142780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22142780 is an abundant number, since it is smaller than the sum of its proper divisors (28584820).

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

22142780 is a wasteful number, since it uses less digits than its factorization.

22142780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100669 (or 100667 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 22142780 is about 4705.6115436785. The cubic root of 22142780 is about 280.8088009244.

It can be divided in two parts, 22142 and 780, that added together give a palindrome (22922).

The spelling of 22142780 in words is "twenty-two million, one hundred forty-two thousand, seven hundred eighty".