398769668 has 48 divisors (see below), whose sum is σ = 779575104. Its totient is φ = 176941440.

The previous prime is 398769641. The next prime is 398769677. The reversal of 398769668 is 866967893.

It is a self number, because there is not a number n which added to its sum of digits gives 398769668.

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, 715646 + ... + 716202.

It is an arithmetic number, because the mean of its divisors is an integer number (16241148).

Almost surely, 2^398769668 is an apocalyptic number.

It is an amenable number.

398769668 is a deficient number, since it is larger than the sum of its proper divisors (380805436).

398769668 is a wasteful number, since it uses less digits than its factorization.

398769668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 930 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 62.

The square root of 398769668 is about 19969.2180117300. The cubic root of 398769668 is about 736.0500935698.

The spelling of 398769668 in words is "three hundred ninety-eight million, seven hundred sixty-nine thousand, six hundred sixty-eight".