223620640 has 48 divisors (see below), whose sum is σ = 540606528. Its totient is φ = 87365376.

The previous prime is 223620629. The next prime is 223620647. The reversal of 223620640 is 46026322.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (223620647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9372 + ... + 23131.

It is an arithmetic number, because the mean of its divisors is an integer number (11262636).

Almost surely, 2^223620640 is an apocalyptic number.

223620640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223620640 is an abundant number, since it is smaller than the sum of its proper divisors (316985888).

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

223620640 is a wasteful number, since it uses less digits than its factorization.

223620640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32561 (or 32553 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 223620640 is about 14953.9506485744. The cubic root of 223620640 is about 606.9747552936.

Adding to 223620640 its reverse (46026322), we get a palindrome (269646962).

The spelling of 223620640 in words is "two hundred twenty-three million, six hundred twenty thousand, six hundred forty".