399148845 has 16 divisors (see below), whose sum is σ = 639030912. Its totient is φ = 212748480.

The previous prime is 399148823. The next prime is 399148853. The reversal of 399148845 is 548841993.

It is not a de Polignac number, because 399148845 - 2¹⁰ = 399147821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20199 + ... + 34731.

It is an arithmetic number, because the mean of its divisors is an integer number (39939432).

Almost surely, 2^399148845 is an apocalyptic number.

It is an amenable number.

399148845 is a deficient number, since it is larger than the sum of its proper divisors (239882067).

399148845 is a wasteful number, since it uses less digits than its factorization.

399148845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16372.

The product of its digits is 1244160, while the sum is 51.

The square root of 399148845 is about 19978.7097931773. The cubic root of 399148845 is about 736.2833149632.

It can be divided in two parts, 399148 and 845, that added together give a palindrome (399993).

The spelling of 399148845 in words is "three hundred ninety-nine million, one hundred forty-eight thousand, eight hundred forty-five".