63998790 has 16 divisors (see below), whose sum is σ = 153597168. Its totient is φ = 17066336.

The previous prime is 63998777. The next prime is 63998801. The reversal of 63998790 is 9789936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1066617 + ... + 1066676.

It is an arithmetic number, because the mean of its divisors is an integer number (9599823).

Almost surely, 2^63998790 is an apocalyptic number.

63998790 is an abundant number, since it is smaller than the sum of its proper divisors (89598378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63998790 is a wasteful number, since it uses less digits than its factorization.

63998790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133303.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 63998790 is about 7999.9243746426. The cubic root of 63998790 is about 399.9974791508.

The spelling of 63998790 in words is "sixty-three million, nine hundred ninety-eight thousand, seven hundred ninety".