3967778842 has 16 divisors (see below), whose sum is σ = 6114281472. Its totient is φ = 1929715920.

The previous prime is 3967778833. The next prime is 3967778887. The reversal of 3967778842 is 2488777693.

3967778842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387367 + ... + 397477.

It is an arithmetic number, because the mean of its divisors is an integer number (382142592).

Almost surely, 2^3967778842 is an apocalyptic number.

3967778842 is a deficient number, since it is larger than the sum of its proper divisors (2146502630).

3967778842 is a wasteful number, since it uses less digits than its factorization.

3967778842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15453.

The product of its digits is 28449792, while the sum is 61.

The square root of 3967778842 is about 62990.3075242533. The cubic root of 3967778842 is about 1583.1272307117.

The spelling of 3967778842 in words is "three billion, nine hundred sixty-seven million, seven hundred seventy-eight thousand, eight hundred forty-two".