3972194388 has 36 divisors (see below), whose sum is σ = 10056402720. Its totient is φ = 1322010576.

The previous prime is 3972194377. The next prime is 3972194417. The reversal of 3972194388 is 8834912793.

3972194388 is a `hidden beast` number, since 3 + 9 + 72 + 194 + 388 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61978 + ... + 108561.

It is an arithmetic number, because the mean of its divisors is an integer number (279344520).

Almost surely, 2^3972194388 is an apocalyptic number.

It is an amenable number.

3972194388 is an abundant number, since it is smaller than the sum of its proper divisors (6084208332).

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

3972194388 is a wasteful number, since it uses less digits than its factorization.

3972194388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171196 (or 171191 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 3972194388 is about 63025.3471866677. The cubic root of 3972194388 is about 1583.7142744887.

The spelling of 3972194388 in words is "three billion, nine hundred seventy-two million, one hundred ninety-four thousand, three hundred eighty-eight".