4391972736 has 64 divisors (see below), whose sum is σ = 11779547520. Its totient is φ = 1449764352.

The previous prime is 4391972731. The next prime is 4391972737. The reversal of 4391972736 is 6372791934.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391972731) 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, 15970 + ... + 95073.

It is an arithmetic number, because the mean of its divisors is an integer number (184055430).

Almost surely, 2^4391972736 is an apocalyptic number.

It is an amenable number.

4391972736 is an abundant number, since it is smaller than the sum of its proper divisors (7387574784).

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

4391972736 is a wasteful number, since it uses less digits than its factorization.

4391972736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111163 (or 111151 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 51.

The square root of 4391972736 is about 66271.9604055893. The cubic root of 4391972736 is about 1637.6454333546.

The spelling of 4391972736 in words is "four billion, three hundred ninety-one million, nine hundred seventy-two thousand, seven hundred thirty-six".