63998120 has 32 divisors (see below), whose sum is σ = 145621800. Its totient is φ = 25310208.

The previous prime is 63998119. The next prime is 63998153. The reversal of 63998120 is 2189936.

It can be written as a sum of positive squares in 4 ways, for example, as 41964484 + 22033636 = 6478^2 + 4694^2 .

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, 5429 + ... + 12548.

Almost surely, 2^63998120 is an apocalyptic number.

It is an amenable number.

63998120 is an abundant number, since it is smaller than the sum of its proper divisors (81623680).

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

63998120 is a wasteful number, since it uses less digits than its factorization.

63998120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18077 (or 18073 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 63998120 is about 7999.8824991371. The cubic root of 63998120 is about 399.9960832950.

The spelling of 63998120 in words is "sixty-three million, nine hundred ninety-eight thousand, one hundred twenty".