63398918 has 24 divisors (see below), whose sum is σ = 106523424. Its totient is φ = 28268240.

The previous prime is 63398917. The next prime is 63398957. The reversal of 63398918 is 81989336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63398917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10355 + ... + 15297.

It is an arithmetic number, because the mean of its divisors is an integer number (4438476).

Almost surely, 2^63398918 is an apocalyptic number.

63398918 is a deficient number, since it is larger than the sum of its proper divisors (43124506).

63398918 is a wasteful number, since it uses less digits than its factorization.

63398918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5020 (or 5009 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 63398918 is about 7962.3437504293. The cubic root of 63398918 is about 398.7438048978.

The spelling of 63398918 in words is "sixty-three million, three hundred ninety-eight thousand, nine hundred eighteen".