646260226 has 8 divisors (see below), whose sum is σ = 971494524. Its totient is φ = 322428720.

The previous prime is 646260203. The next prime is 646260227. The reversal of 646260226 is 622062646.

It can be written as a sum of positive squares in 2 ways, for example, as 575952001 + 70308225 = 23999^2 + 8385^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 646260191 and 646260200.

It is not an unprimeable number, because it can be changed into a prime (646260227) 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, 349545 + ... + 351388.

Almost surely, 2^646260226 is an apocalyptic number.

646260226 is a deficient number, since it is larger than the sum of its proper divisors (325234298).

646260226 is a wasteful number, since it uses less digits than its factorization.

646260226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701396.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 646260226 is about 25421.6487663566. The cubic root of 646260226 is about 864.5746072319.

The spelling of 646260226 in words is "six hundred forty-six million, two hundred sixty thousand, two hundred twenty-six".