22246640 has 40 divisors (see below), whose sum is σ = 55704768. Its totient is φ = 8213760.

The previous prime is 22246621. The next prime is 22246667. The reversal of 22246640 is 4664222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (26).

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 7 ways as a sum of consecutive naturals, for example, 9656 + ... + 11735.

Almost surely, 2^22246640 is an apocalyptic number.

22246640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22246640 is an abundant number, since it is smaller than the sum of its proper divisors (33458128).

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

22246640 is a wasteful number, since it uses less digits than its factorization.

22246640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21417 (or 21411 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 22246640 is about 4716.6343932936. The cubic root of 22246640 is about 281.2471578314.

The spelling of 22246640 in words is "twenty-two million, two hundred forty-six thousand, six hundred forty".