223972690 has 16 divisors (see below), whose sum is σ = 403934040. Its totient is φ = 89415040.

The previous prime is 223972631. The next prime is 223972747. The reversal of 223972690 is 96279322.

223972690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 154032921 + 69939769 = 12411^2 + 8363^2 .

It is a super-2 number, since 2×223972690² = 100327531731672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16285 + ... + 26704.

Almost surely, 2^223972690 is an apocalyptic number.

223972690 is a deficient number, since it is larger than the sum of its proper divisors (179961350).

223972690 is a wasteful number, since it uses less digits than its factorization.

223972690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43517.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 223972690 is about 14965.7171562207. The cubic root of 223972690 is about 607.2931120492.

The spelling of 223972690 in words is "two hundred twenty-three million, nine hundred seventy-two thousand, six hundred ninety".