398697308 has 12 divisors (see below), whose sum is σ = 697860072. Its totient is φ = 199308720.

The previous prime is 398697289. The next prime is 398697317. The reversal of 398697308 is 803796893.

It is a self number, because there is not a number n which added to its sum of digits gives 398697308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34598 + ... + 44658.

It is an arithmetic number, because the mean of its divisors is an integer number (58155006).

Almost surely, 2^398697308 is an apocalyptic number.

It is an amenable number.

398697308 is a deficient number, since it is larger than the sum of its proper divisors (299162764).

398697308 is a wasteful number, since it uses less digits than its factorization.

398697308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19972 (or 19970 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 398697308 is about 19967.4061410089. The cubic root of 398697308 is about 736.0055701177.

The spelling of 398697308 in words is "three hundred ninety-eight million, six hundred ninety-seven thousand, three hundred eight".