399447066 has 16 divisors (see below), whose sum is σ = 799099488. Its totient is φ = 133114800.

The previous prime is 399447029. The next prime is 399447071. The reversal of 399447066 is 660744993.

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, 30321 + ... + 41451.

It is an arithmetic number, because the mean of its divisors is an integer number (49943718).

Almost surely, 2^399447066 is an apocalyptic number.

399447066 is an abundant number, since it is smaller than the sum of its proper divisors (399652422).

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

399447066 is a wasteful number, since it uses less digits than its factorization.

399447066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17117.

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 399447066 is about 19986.1718695702. The cubic root of 399447066 is about 736.4666387928.

The spelling of 399447066 in words is "three hundred ninety-nine million, four hundred forty-seven thousand, sixty-six".