3983721456 has 80 divisors (see below), whose sum is σ = 12090476160. Its totient is φ = 1114325760.

The previous prime is 3983721451. The next prime is 3983721479. The reversal of 3983721456 is 6541273893.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3983721451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283326 + ... + 297053.

It is an arithmetic number, because the mean of its divisors is an integer number (151130952).

Almost surely, 2^3983721456 is an apocalyptic number.

It is an amenable number.

3983721456 is an abundant number, since it is smaller than the sum of its proper divisors (8106754704).

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

3983721456 is a wasteful number, since it uses less digits than its factorization.

3983721456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580414 (or 580408 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 3983721456 is about 63116.7288125739. The cubic root of 3983721456 is about 1585.2447426970.

The spelling of 3983721456 in words is "three billion, nine hundred eighty-three million, seven hundred twenty-one thousand, four hundred fifty-six".