399001738 has 8 divisors (see below), whose sum is σ = 599490432. Its totient is φ = 199171596.

The previous prime is 399001717. The next prime is 399001739. The reversal of 399001738 is 837100993.

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

It is a self number, because there is not a number n which added to its sum of digits gives 399001738.

It is not an unprimeable number, because it can be changed into a prime (399001739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163120 + ... + 165547.

It is an arithmetic number, because the mean of its divisors is an integer number (74936304).

Almost surely, 2^399001738 is an apocalyptic number.

399001738 is a deficient number, since it is larger than the sum of its proper divisors (200488694).

399001738 is a wasteful number, since it uses less digits than its factorization.

399001738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329276.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 399001738 is about 19975.0278598054. The cubic root of 399001738 is about 736.1928510173.

The spelling of 399001738 in words is "three hundred ninety-nine million, one thousand, seven hundred thirty-eight".