3638780780 has 24 divisors (see below), whose sum is σ = 7973677152. Its totient is φ = 1392228992.

The previous prime is 3638780767. The next prime is 3638780851. The reversal of 3638780780 is 870878363.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3954737 + ... + 3955656.

It is an arithmetic number, because the mean of its divisors is an integer number (332236548).

Almost surely, 2^3638780780 is an apocalyptic number.

It is an amenable number.

3638780780 is an abundant number, since it is smaller than the sum of its proper divisors (4334896372).

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

3638780780 is a wasteful number, since it uses less digits than its factorization.

3638780780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7910425 (or 7910423 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 3638780780 is about 60322.3074823900. The cubic root of 3638780780 is about 1538.1025684055.

The spelling of 3638780780 in words is "three billion, six hundred thirty-eight million, seven hundred eighty thousand, seven hundred eighty".