63820386 has 80 divisors (see below), whose sum is σ = 164900736. Its totient is φ = 18071424.

The previous prime is 63820357. The next prime is 63820447. The reversal of 63820386 is 68302836.

It is a self number, because there is not a number n which added to its sum of digits gives 63820386.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 189210 + ... + 189546.

Almost surely, 2^63820386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63820386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82450368).

63820386 is an abundant number, since it is smaller than the sum of its proper divisors (101080350).

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

63820386 is a wasteful number, since it uses less digits than its factorization.

63820386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 63820386 is about 7988.7662376615. The cubic root of 63820386 is about 399.6254535635.

The spelling of 63820386 in words is "sixty-three million, eight hundred twenty thousand, three hundred eighty-six".