399928373 has 16 divisors (see below), whose sum is σ = 440112960. Its totient is φ = 361151616.

The previous prime is 399928351. The next prime is 399928379. The reversal of 399928373 is 373829993.

It is a cyclic number.

It is not a de Polignac number, because 399928373 - 2¹² = 399924277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399928379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172961 + ... + 175257.

It is an arithmetic number, because the mean of its divisors is an integer number (27507060).

Almost surely, 2^399928373 is an apocalyptic number.

It is an amenable number.

399928373 is a deficient number, since it is larger than the sum of its proper divisors (40184587).

399928373 is a wasteful number, since it uses less digits than its factorization.

399928373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596.

The product of its digits is 2204496, while the sum is 53.

The square root of 399928373 is about 19998.2092448299. The cubic root of 399928373 is about 736.7623177487.

The spelling of 399928373 in words is "three hundred ninety-nine million, nine hundred twenty-eight thousand, three hundred seventy-three".