3971796540 has 48 divisors (see below), whose sum is σ = 11124019872. Its totient is φ = 1058861056.

The previous prime is 3971796509. The next prime is 3971796541. The reversal of 3971796540 is 456971793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971796541) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 311572 + ... + 324068.

It is an arithmetic number, because the mean of its divisors is an integer number (231750414).

Almost surely, 2^3971796540 is an apocalyptic number.

3971796540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3971796540 is an abundant number, since it is smaller than the sum of its proper divisors (7152223332).

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

3971796540 is a wasteful number, since it uses less digits than its factorization.

3971796540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17806 (or 17804 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 51.

The square root of 3971796540 is about 63022.1908536985. The cubic root of 3971796540 is about 1583.6613987117.

The spelling of 3971796540 in words is "three billion, nine hundred seventy-one million, seven hundred ninety-six thousand, five hundred forty".