399290698 has 8 divisors (see below), whose sum is σ = 604236708. Its totient is φ = 197878464.

The previous prime is 399290693. The next prime is 399290767. The reversal of 399290698 is 896092993.

It can be written as a sum of positive squares in 2 ways, for example, as 280328049 + 118962649 = 16743^2 + 10907^2 .

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

It is not an unprimeable number, because it can be changed into a prime (399290693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883161 + ... + 883612.

Almost surely, 2^399290698 is an apocalyptic number.

399290698 is a deficient number, since it is larger than the sum of its proper divisors (204946010).

399290698 is a wasteful number, since it uses less digits than its factorization.

399290698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766888.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The square root of 399290698 is about 19982.2595819392. The cubic root of 399290698 is about 736.3705268960.

The spelling of 399290698 in words is "three hundred ninety-nine million, two hundred ninety thousand, six hundred ninety-eight".