3971536540 has 24 divisors (see below), whose sum is σ = 8341410672. Its totient is φ = 1588389120.

The previous prime is 3971536537. The next prime is 3971536601. The reversal of 3971536540 is 456351793.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 269647 + ... + 283993.

It is an arithmetic number, because the mean of its divisors is an integer number (347558778).

Almost surely, 2^3971536540 is an apocalyptic number.

It is an amenable number.

3971536540 is an abundant number, since it is smaller than the sum of its proper divisors (4369874132).

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

3971536540 is a wasteful number, since it uses less digits than its factorization.

3971536540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28197 (or 28195 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 43.

The square root of 3971536540 is about 63020.1280544557. The cubic root of 3971536540 is about 1583.6268416421.

The spelling of 3971536540 in words is "three billion, nine hundred seventy-one million, five hundred thirty-six thousand, five hundred forty".