3947181486 has 16 divisors (see below), whose sum is σ = 8309856000. Its totient is φ = 1246478328.

The previous prime is 3947181481. The next prime is 3947181487. The reversal of 3947181486 is 6841817493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947181481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17312086 + ... + 17312313.

It is an arithmetic number, because the mean of its divisors is an integer number (519366000).

Almost surely, 2^3947181486 is an apocalyptic number.

3947181486 is an abundant number, since it is smaller than the sum of its proper divisors (4362674514).

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

3947181486 is a wasteful number, since it uses less digits than its factorization.

3947181486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34624423.

The product of its digits is 1161216, while the sum is 51.

The square root of 3947181486 is about 62826.5985550706. The cubic root of 3947181486 is about 1580.3830569929.

The spelling of 3947181486 in words is "three billion, nine hundred forty-seven million, one hundred eighty-one thousand, four hundred eighty-six".