399140282 has 12 divisors (see below), whose sum is σ = 620070126. Its totient is φ = 192687600.

The previous prime is 399140279. The next prime is 399140293. The reversal of 399140282 is 282041993.

It can be written as a sum of positive squares in 3 ways, for example, as 354531241 + 44609041 = 18829^2 + 6679^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 116969 + ... + 120332.

Almost surely, 2^399140282 is an apocalyptic number.

399140282 is a deficient number, since it is larger than the sum of its proper divisors (220929844).

399140282 is a wasteful number, since it uses less digits than its factorization.

399140282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237361 (or 237332 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 399140282 is about 19978.4954889001. The cubic root of 399140282 is about 736.2780497268.

The spelling of 399140282 in words is "three hundred ninety-nine million, one hundred forty thousand, two hundred eighty-two".