3971274240 has 160 divisors (see below), whose sum is σ = 12876247296. Its totient is φ = 1043947520.

The previous prime is 3971274221. The next prime is 3971274271. The reversal of 3971274240 is 424721793.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541639 + ... + 548921.

Almost surely, 2^3971274240 is an apocalyptic number.

3971274240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3971274240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6438123648).

3971274240 is an abundant number, since it is smaller than the sum of its proper divisors (8904973056).

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

3971274240 is an equidigital number, since it uses as much as digits as its factorization.

3971274240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7380 (or 7364 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 3971274240 is about 63018.0469389523. The cubic root of 3971274240 is about 1583.5919773470.

The spelling of 3971274240 in words is "three billion, nine hundred seventy-one million, two hundred seventy-four thousand, two hundred forty".