3884561978 has 12 divisors (see below), whose sum is σ = 6404712090. Its totient is φ = 1765709880.

The previous prime is 3884561969. The next prime is 3884562029. The reversal of 3884561978 is 8791654883.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3776962849 + 107599129 = 61457^2 + 10373^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8025713 + ... + 8026196.

Almost surely, 2^3884561978 is an apocalyptic number.

3884561978 is a deficient number, since it is larger than the sum of its proper divisors (2520150112).

3884561978 is a wasteful number, since it uses less digits than its factorization.

3884561978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16051933 (or 16051922 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 59.

The square root of 3884561978 is about 62326.2543235192. The cubic root of 3884561978 is about 1571.9812139088.

The spelling of 3884561978 in words is "three billion, eight hundred eighty-four million, five hundred sixty-one thousand, nine hundred seventy-eight".