399928029 has 8 divisors (see below), whose sum is σ = 544583040. Its totient is φ = 260945856.

The previous prime is 399928027. The next prime is 399928031. The reversal of 399928029 is 920829993.

It is an interprime number because it is at equal distance from previous prime (399928027) and next prime (399928031).

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

It is not a de Polignac number, because 399928029 - 2¹ = 399928027 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399928027) 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, 1418044 + ... + 1418325.

It is an arithmetic number, because the mean of its divisors is an integer number (68072880).

Almost surely, 2^399928029 is an apocalyptic number.

It is an amenable number.

399928029 is a deficient number, since it is larger than the sum of its proper divisors (144655011).

399928029 is a wasteful number, since it uses less digits than its factorization.

399928029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836419.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 399928029 is about 19998.2006440580. The cubic root of 399928029 is about 736.7621065056.

The spelling of 399928029 in words is "three hundred ninety-nine million, nine hundred twenty-eight thousand, twenty-nine".