3967769638 has 16 divisors (see below), whose sum is σ = 7202002464. Its totient is φ = 1600444800.

The previous prime is 3967769593. The next prime is 3967769671. The reversal of 3967769638 is 8369677693.

It is a self number, because there is not a number n which added to its sum of digits gives 3967769638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8335413 + ... + 8335888.

It is an arithmetic number, because the mean of its divisors is an integer number (450125154).

Almost surely, 2^3967769638 is an apocalyptic number.

3967769638 is a deficient number, since it is larger than the sum of its proper divisors (3234232826).

3967769638 is a wasteful number, since it uses less digits than its factorization.

3967769638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16671327.

The product of its digits is 61725888, while the sum is 64.

The square root of 3967769638 is about 62990.2344653518. The cubic root of 3967769638 is about 1583.1260065915.

The spelling of 3967769638 in words is "three billion, nine hundred sixty-seven million, seven hundred sixty-nine thousand, six hundred thirty-eight".