22755640 has 16 divisors (see below), whose sum is σ = 51200280. Its totient is φ = 9102240.

The previous prime is 22755619. The next prime is 22755647. The reversal of 22755640 is 4655722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22755647) 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 3 ways as a sum of consecutive naturals, for example, 284406 + ... + 284485.

Almost surely, 2^22755640 is an apocalyptic number.

22755640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22755640 is an abundant number, since it is smaller than the sum of its proper divisors (28444640).

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

22755640 is a wasteful number, since it uses less digits than its factorization.

22755640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568902 (or 568898 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 22755640 is about 4770.2872030938. The cubic root of 22755640 is about 283.3759689780.

The spelling of 22755640 in words is "twenty-two million, seven hundred fifty-five thousand, six hundred forty".