399730266 has 36 divisors (see below), whose sum is σ = 933418122. Its totient is φ = 122899824.

The previous prime is 399730259. The next prime is 399730267. The reversal of 399730266 is 662037993.

It can be written as a sum of positive squares in only one way, i.e., 384356025 + 15374241 = 19605^2 + 3921^2 .

It is not an unprimeable number, because it can be changed into a prime (399730267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 305185 + ... + 306491.

Almost surely, 2^399730266 is an apocalyptic number.

399730266 is an abundant number, since it is smaller than the sum of its proper divisors (533687856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399730266 is a wasteful number, since it uses less digits than its factorization.

399730266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 399730266 is about 19993.2555127973. The cubic root of 399730266 is about 736.6406443947.

The spelling of 399730266 in words is "three hundred ninety-nine million, seven hundred thirty thousand, two hundred sixty-six".