3947655740 has 48 divisors (see below), whose sum is σ = 9801086400. Its totient is φ = 1306808832.

The previous prime is 3947655737. The next prime is 3947655743. The reversal of 3947655740 is 475567493.

It is an interprime number because it is at equal distance from previous prime (3947655737) and next prime (3947655743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947655743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482105 + ... + 490224.

It is an arithmetic number, because the mean of its divisors is an integer number (204189300).

Almost surely, 2^3947655740 is an apocalyptic number.

It is an amenable number.

3947655740 is an abundant number, since it is smaller than the sum of its proper divisors (5853430660).

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

3947655740 is a wasteful number, since it uses less digits than its factorization.

3947655740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972374 (or 972372 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 50.

The square root of 3947655740 is about 62830.3727507644. The cubic root of 3947655740 is about 1580.4463488188.

The spelling of 3947655740 in words is "three billion, nine hundred forty-seven million, six hundred fifty-five thousand, seven hundred forty".