399833834 has 16 divisors (see below), whose sum is σ = 631709280. Its totient is φ = 189277200.

The previous prime is 399833831. The next prime is 399833843. The reversal of 399833834 is 438338993.

It is a super-2 number, since 2×399833834² = 319734189622279112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (399833831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106184 + ... + 109884.

It is an arithmetic number, because the mean of its divisors is an integer number (39481830).

Almost surely, 2^399833834 is an apocalyptic number.

399833834 is a deficient number, since it is larger than the sum of its proper divisors (231875446).

399833834 is a wasteful number, since it uses less digits than its factorization.

399833834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6565.

The product of its digits is 1679616, while the sum is 50.

The square root of 399833834 is about 19995.8454184863. The cubic root of 399833834 is about 736.7042588007.

The spelling of 399833834 in words is "three hundred ninety-nine million, eight hundred thirty-three thousand, eight hundred thirty-four".