399349266 has 32 divisors (see below), whose sum is σ = 828576000. Its totient is φ = 128219520.

The previous prime is 399349259. The next prime is 399349267. The reversal of 399349266 is 662943993.

It is a super-3 number, since 3×399349266³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (399349267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9160 + ... + 29708.

It is an arithmetic number, because the mean of its divisors is an integer number (25893000).

Almost surely, 2^399349266 is an apocalyptic number.

399349266 is an abundant number, since it is smaller than the sum of its proper divisors (429226734).

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

399349266 is a wasteful number, since it uses less digits than its factorization.

399349266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20674.

The product of its digits is 1889568, while the sum is 51.

The square root of 399349266 is about 19983.7250281323. The cubic root of 399349266 is about 736.4065287703.

The spelling of 399349266 in words is "three hundred ninety-nine million, three hundred forty-nine thousand, two hundred sixty-six".