3947247760 has 40 divisors (see below), whose sum is σ = 9180896760. Its totient is φ = 1578289152.

The previous prime is 3947247749. The next prime is 3947247767. The reversal of 3947247760 is 677427493.

It can be written as a sum of positive squares in 4 ways, for example, as 1632483216 + 2314764544 = 40404^2 + 48112^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (3947247767) 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, 239134 + ... + 255106.

It is an arithmetic number, because the mean of its divisors is an integer number (229522419).

Almost surely, 2^3947247760 is an apocalyptic number.

It is an amenable number.

3947247760 is an abundant number, since it is smaller than the sum of its proper divisors (5233649000).

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

3947247760 is a wasteful number, since it uses less digits than its factorization.

3947247760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19075 (or 19069 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 49.

The square root of 3947247760 is about 62827.1259887001. The cubic root of 3947247760 is about 1580.3919019304.

The spelling of 3947247760 in words is "three billion, nine hundred forty-seven million, two hundred forty-seven thousand, seven hundred sixty".