223664394 has 8 divisors (see below), whose sum is σ = 447328800. Its totient is φ = 74554796.

The previous prime is 223664383. The next prime is 223664407. The reversal of 223664394 is 493466322.

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

223664394 is an admirable number.

It is a super-2 number, since 2×223664394² = 100051522286774472, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 18638694 + ... + 18638705.

It is an arithmetic number, because the mean of its divisors is an integer number (55916100).

Almost surely, 2^223664394 is an apocalyptic number.

223664394 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.

223664394 is a wasteful number, since it uses less digits than its factorization.

223664394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37277404.

The product of its digits is 186624, while the sum is 39.

The square root of 223664394 is about 14955.4135349043. The cubic root of 223664394 is about 607.0143399544.

The spelling of 223664394 in words is "two hundred twenty-three million, six hundred sixty-four thousand, three hundred ninety-four".