223645040 has 20 divisors (see below), whose sum is σ = 519974904. Its totient is φ = 89457984.

The previous prime is 223645039. The next prime is 223645049. The reversal of 223645040 is 40546322.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223645049) 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, 1397702 + ... + 1397861.

Almost surely, 2^223645040 is an apocalyptic number.

223645040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223645040 is an abundant number, since it is smaller than the sum of its proper divisors (296329864).

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

223645040 is a wasteful number, since it uses less digits than its factorization.

223645040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795576 (or 2795570 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 223645040 is about 14954.7664642414. The cubic root of 223645040 is about 606.9968308429.

The spelling of 223645040 in words is "two hundred twenty-three million, six hundred forty-five thousand, forty".