63845780 has 12 divisors (see below), whose sum is σ = 134076180. Its totient is φ = 25538304.

The previous prime is 63845779. The next prime is 63845797. The reversal of 63845780 is 8754836.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24482704 + 39363076 = 4948^2 + 6274^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 1596125 + ... + 1596164.

It is an arithmetic number, because the mean of its divisors is an integer number (11173015).

Almost surely, 2^63845780 is an apocalyptic number.

It is an amenable number.

63845780 is an abundant number, since it is smaller than the sum of its proper divisors (70230400).

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

63845780 is a wasteful number, since it uses less digits than its factorization.

63845780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192298 (or 3192296 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 63845780 is about 7990.3554363996. The cubic root of 63845780 is about 399.6784499165.

The spelling of 63845780 in words is "sixty-three million, eight hundred forty-five thousand, seven hundred eighty".