3971826398 has 8 divisors (see below), whose sum is σ = 5962559592. Its totient is φ = 1984306536.

The previous prime is 3971826389. The next prime is 3971826421. The reversal of 3971826398 is 8936281793.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 800240 + ... + 805187.

It is an arithmetic number, because the mean of its divisors is an integer number (745319949).

Almost surely, 2^3971826398 is an apocalyptic number.

3971826398 is a deficient number, since it is larger than the sum of its proper divisors (1990733194).

3971826398 is a wasteful number, since it uses less digits than its factorization.

3971826398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606666.

The product of its digits is 3919104, while the sum is 56.

The square root of 3971826398 is about 63022.4277380680. The cubic root of 3971826398 is about 1583.6653670959.

The spelling of 3971826398 in words is "three billion, nine hundred seventy-one million, eight hundred twenty-six thousand, three hundred ninety-eight".