3974638956 has 48 divisors (see below), whose sum is σ = 9768124800. Its totient is φ = 1254396672.

The previous prime is 3974638949. The next prime is 3974638963. The reversal of 3974638956 is 6598364793.

It is an interprime number because it is at equal distance from previous prime (3974638949) and next prime (3974638963).

It is a self number, because there is not a number n which added to its sum of digits gives 3974638956.

It is an unprimeable number.

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, 470740 + ... + 479108.

It is an arithmetic number, because the mean of its divisors is an integer number (203502600).

Almost surely, 2^3974638956 is an apocalyptic number.

It is an amenable number.

3974638956 is an abundant number, since it is smaller than the sum of its proper divisors (5793485844).

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

3974638956 is a wasteful number, since it uses less digits than its factorization.

3974638956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10478 (or 10476 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 60.

The square root of 3974638956 is about 63044.7377344057. The cubic root of 3974638956 is about 1584.0390910284.

The spelling of 3974638956 in words is "three billion, nine hundred seventy-four million, six hundred thirty-eight thousand, nine hundred fifty-six".