399882009 has 8 divisors (see below), whose sum is σ = 533272672. Its totient is φ = 266539680.

The previous prime is 399881987. The next prime is 399882053. The reversal of 399882009 is 900288993.

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

It is not a de Polignac number, because 399882009 - 2¹² = 399877913 is a prime.

It is a super-2 number, since 2×399882009² = 319811242243752162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399882059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17742 + ... + 33384.

It is an arithmetic number, because the mean of its divisors is an integer number (66659084).

Almost surely, 2^399882009 is an apocalyptic number.

It is an amenable number.

399882009 is a deficient number, since it is larger than the sum of its proper divisors (133390663).

399882009 is a wasteful number, since it uses less digits than its factorization.

399882009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24167.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 399882009 is about 19997.0500074386. The cubic root of 399882009 is about 736.7338455101.

The spelling of 399882009 in words is "three hundred ninety-nine million, eight hundred eighty-two thousand, nine".