63998742 has 32 divisors (see below), whose sum is σ = 134410752. Its totient is φ = 20275904.

The previous prime is 63998723. The next prime is 63998771. The reversal of 63998742 is 24789936.

It is a junction number, because it is equal to n+sod(n) for n = 63998691 and 63998700.

It is a congruent number.

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, 21658 + ... + 24434.

It is an arithmetic number, because the mean of its divisors is an integer number (4200336).

Almost surely, 2^63998742 is an apocalyptic number.

63998742 is an abundant number, since it is smaller than the sum of its proper divisors (70412010).

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

63998742 is a wasteful number, since it uses less digits than its factorization.

63998742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972.

The product of its digits is 653184, while the sum is 48.

The square root of 63998742 is about 7999.9213746136. The cubic root of 63998742 is about 399.9973791495.

The spelling of 63998742 in words is "sixty-three million, nine hundred ninety-eight thousand, seven hundred forty-two".