22646380 has 48 divisors (see below), whose sum is σ = 51559200. Its totient is φ = 8322048.

The previous prime is 22646359. The next prime is 22646381. The reversal of 22646380 is 8364622.

It is not an unprimeable number, because it can be changed into a prime (22646381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13846 + ... + 15394.

It is an arithmetic number, because the mean of its divisors is an integer number (1074150).

Almost surely, 2^22646380 is an apocalyptic number.

22646380 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 22646380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25779600).

22646380 is an abundant number, since it is smaller than the sum of its proper divisors (28912820).

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

22646380 is a wasteful number, since it uses less digits than its factorization.

22646380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 22646380 is about 4758.8212826287. The cubic root of 22646380 is about 282.9217029211.

The spelling of 22646380 in words is "twenty-two million, six hundred forty-six thousand, three hundred eighty".