399585145 has 8 divisors (see below), whose sum is σ = 479768904. Its totient is φ = 319490304.

The previous prime is 399585103. The next prime is 399585161. The reversal of 399585145 is 541585993.

It can be written as a sum of positive squares in 4 ways, for example, as 137663289 + 261921856 = 11733^2 + 16184^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 399585145 - 2¹¹ = 399583097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11904 + ... + 30673.

It is an arithmetic number, because the mean of its divisors is an integer number (59971113).

Almost surely, 2^399585145 is an apocalyptic number.

It is an amenable number.

399585145 is a deficient number, since it is larger than the sum of its proper divisors (80183759).

399585145 is a wasteful number, since it uses less digits than its factorization.

399585145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44459.

The product of its digits is 972000, while the sum is 49.

The square root of 399585145 is about 19989.6259344691. The cubic root of 399585145 is about 736.5514884684.

The spelling of 399585145 in words is "three hundred ninety-nine million, five hundred eighty-five thousand, one hundred forty-five".