3972440556 has 96 divisors (see below), whose sum is σ = 11915688960. Its totient is φ = 1134965520.

The previous prime is 3972440543. The next prime is 3972440569. The reversal of 3972440556 is 6550442793.

3972440556 is a `hidden beast` number, since 3 + 97 + 2 + 4 + 4 + 0 + 556 = 666.

It is an interprime number because it is at equal distance from previous prime (3972440543) and next prime (3972440569).

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 31 ways as a sum of consecutive naturals, for example, 28801 + ... + 93671.

It is an arithmetic number, because the mean of its divisors is an integer number (124121760).

Almost surely, 2^3972440556 is an apocalyptic number.

3972440556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3972440556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5957844480).

3972440556 is an abundant number, since it is smaller than the sum of its proper divisors (7943248404).

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

3972440556 is an equidigital number, since it uses as much as digits as its factorization.

3972440556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64903 (or 64883 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The square root of 3972440556 is about 63027.3000849632. The cubic root of 3972440556 is about 1583.7469895478.

The spelling of 3972440556 in words is "three billion, nine hundred seventy-two million, four hundred forty thousand, five hundred fifty-six".