399028403 has 12 divisors (see below), whose sum is σ = 441678888. Its totient is φ = 359219520.

The previous prime is 399028397. The next prime is 399028417. The reversal of 399028403 is 304820993.

It is not a de Polignac number, because 399028403 - 2⁶ = 399028339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399028423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13193 + ... + 31178.

It is an arithmetic number, because the mean of its divisors is an integer number (36806574).

Almost surely, 2^399028403 is an apocalyptic number.

399028403 is a deficient number, since it is larger than the sum of its proper divisors (42650485).

399028403 is a wasteful number, since it uses less digits than its factorization.

399028403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44434 (or 44411 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 399028403 is about 19975.6953070475. The cubic root of 399028403 is about 736.2092503987.

The spelling of 399028403 in words is "three hundred ninety-nine million, twenty-eight thousand, four hundred three".