63780740 has 12 divisors (see below), whose sum is σ = 133939596. Its totient is φ = 25512288.

The previous prime is 63780737. The next prime is 63780749. The reversal of 63780740 is 4708736.

It can be written as a sum of positive squares in 2 ways, for example, as 11710084 + 52070656 = 3422^2 + 7216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63780740.

It is not an unprimeable number, because it can be changed into a prime (63780749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1594499 + ... + 1594538.

It is an arithmetic number, because the mean of its divisors is an integer number (11161633).

Almost surely, 2^63780740 is an apocalyptic number.

It is an amenable number.

63780740 is an abundant number, since it is smaller than the sum of its proper divisors (70158856).

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

63780740 is a wasteful number, since it uses less digits than its factorization.

63780740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189046 (or 3189044 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 63780740 is about 7986.2844928039. The cubic root of 63780740 is about 399.5426856916.

The spelling of 63780740 in words is "sixty-three million, seven hundred eighty thousand, seven hundred forty".