223456690 has 16 divisors (see below), whose sum is σ = 413093592. Its totient is φ = 86966784.

The previous prime is 223456643. The next prime is 223456729. The reversal of 223456690 is 96654322.

It can be written as a sum of positive squares in 4 ways, for example, as 167521249 + 55935441 = 12943^2 + 7479^2 .

It is a super-2 number, since 2×223456690² = 99865784611512200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 301599 + ... + 302338.

Almost surely, 2^223456690 is an apocalyptic number.

223456690 is a deficient number, since it is larger than the sum of its proper divisors (189636902).

223456690 is a wasteful number, since it uses less digits than its factorization.

223456690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603981.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 223456690 is about 14948.4678144618. The cubic root of 223456690 is about 606.8263822262.

The spelling of 223456690 in words is "two hundred twenty-three million, four hundred fifty-six thousand, six hundred ninety".