22773780 has 72 divisors (see below), whose sum is σ = 72727200. Its totient is φ = 5752512.

The previous prime is 22773743. The next prime is 22773781. The reversal of 22773780 is 8737722.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22773781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91 + ... + 6749.

It is an arithmetic number, because the mean of its divisors is an integer number (1010100).

Almost surely, 2^22773780 is an apocalyptic number.

22773780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22773780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36363600).

22773780 is an abundant number, since it is smaller than the sum of its proper divisors (49953420).

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

22773780 is a wasteful number, since it uses less digits than its factorization.

22773780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6693 (or 6688 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 22773780 is about 4772.1881773459. The cubic root of 22773780 is about 283.4512481140.

The spelling of 22773780 in words is "twenty-two million, seven hundred seventy-three thousand, seven hundred eighty".