399381741 has 24 divisors (see below), whose sum is σ = 630040320. Its totient is φ = 241776000.

The previous prime is 399381713. The next prime is 399381791. The reversal of 399381741 is 147183993.

It is not a de Polignac number, because 399381741 - 2⁵ = 399381709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399381791) 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 23 ways as a sum of consecutive naturals, for example, 117220 + ... + 120578.

It is an arithmetic number, because the mean of its divisors is an integer number (26251680).

Almost surely, 2^399381741 is an apocalyptic number.

It is an amenable number.

399381741 is a deficient number, since it is larger than the sum of its proper divisors (230658579).

399381741 is a wasteful number, since it uses less digits than its factorization.

399381741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577 (or 4574 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 399381741 is about 19984.5375478143. The cubic root of 399381741 is about 736.4264897050.

The spelling of 399381741 in words is "three hundred ninety-nine million, three hundred eighty-one thousand, seven hundred forty-one".