63820340 has 12 divisors (see below), whose sum is σ = 134022756. Its totient is φ = 25528128.

The previous prime is 63820333. The next prime is 63820357. The reversal of 63820340 is 4302836.

It can be written as a sum of positive squares in 2 ways, for example, as 17007376 + 46812964 = 4124^2 + 6842^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595489 + ... + 1595528.

It is an arithmetic number, because the mean of its divisors is an integer number (11168563).

Almost surely, 2^63820340 is an apocalyptic number.

It is an amenable number.

63820340 is an abundant number, since it is smaller than the sum of its proper divisors (70202416).

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

63820340 is a wasteful number, since it uses less digits than its factorization.

63820340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191026 (or 3191024 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 63820340 is about 7988.7633586182. The cubic root of 63820340 is about 399.6253575505.

The spelling of 63820340 in words is "sixty-three million, eight hundred twenty thousand, three hundred forty".