22667640 has 64 divisors (see below), whose sum is σ = 68666400. Its totient is φ = 5985792.

The previous prime is 22667633. The next prime is 22667651. The reversal of 22667640 is 4676622.

It is a congruent number.

It is an unprimeable number.

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, 12214 + ... + 13946.

Almost surely, 2^22667640 is an apocalyptic number.

22667640 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 22667640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34333200).

22667640 is an abundant number, since it is smaller than the sum of its proper divisors (45998760).

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

22667640 is a wasteful number, since it uses less digits than its factorization.

22667640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1852 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 22667640 is about 4761.0545050440. The cubic root of 22667640 is about 283.0102091070.

The spelling of 22667640 in words is "twenty-two million, six hundred sixty-seven thousand, six hundred forty".