223990638 has 8 divisors (see below), whose sum is σ = 447981288. Its totient is φ = 74663544.

The previous prime is 223990633. The next prime is 223990681. The reversal of 223990638 is 836099322.

It is a sphenic number, since it is the product of 3 distinct primes.

223990638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 223990638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223990631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18665881 + ... + 18665892.

It is an arithmetic number, because the mean of its divisors is an integer number (55997661).

Almost surely, 2^223990638 is an apocalyptic number.

223990638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

223990638 is a wasteful number, since it uses less digits than its factorization.

223990638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37331778.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 223990638 is about 14966.3167813594. The cubic root of 223990638 is about 607.3093333805.

The spelling of 223990638 in words is "two hundred twenty-three million, nine hundred ninety thousand, six hundred thirty-eight".