399289377 has 16 divisors (see below), whose sum is σ = 537736320. Its totient is φ = 263528832.

The previous prime is 399289369. The next prime is 399289391. The reversal of 399289377 is 773982993.

It is not a de Polignac number, because 399289377 - 2³ = 399289369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399289327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179323 + ... + 181535.

It is an arithmetic number, because the mean of its divisors is an integer number (33608520).

Almost surely, 2^399289377 is an apocalyptic number.

It is an amenable number.

399289377 is a deficient number, since it is larger than the sum of its proper divisors (138446943).

399289377 is a wasteful number, since it uses less digits than its factorization.

399289377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792.

The product of its digits is 5143824, while the sum is 57.

The square root of 399289377 is about 19982.2265275920. The cubic root of 399289377 is about 736.3697148339.

The spelling of 399289377 in words is "three hundred ninety-nine million, two hundred eighty-nine thousand, three hundred seventy-seven".