226646989 has 4 divisors (see below), whose sum is σ = 226782556. Its totient is φ = 226511424.

The previous prime is 226646957. The next prime is 226647007. The reversal of 226646989 is 989646622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117548964 + 109098025 = 10842^2 + 10445^2 .

It is a cyclic number.

It is not a de Polignac number, because 226646989 - 2⁵ = 226646957 is a prime.

It is a super-2 number, since 2×226646989² = 102737715245532242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226646389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65244 + ... + 68629.

It is an arithmetic number, because the mean of its divisors is an integer number (56695639).

Almost surely, 2^226646989 is an apocalyptic number.

It is an amenable number.

226646989 is a deficient number, since it is larger than the sum of its proper divisors (135567).

226646989 is a wasteful number, since it uses less digits than its factorization.

226646989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135566.

The product of its digits is 2239488, while the sum is 52.

The square root of 226646989 is about 15054.7995337035. The cubic root of 226646989 is about 609.7006405351.

The spelling of 226646989 in words is "two hundred twenty-six million, six hundred forty-six thousand, nine hundred eighty-nine".