3981706320 has 40 divisors (see below), whose sum is σ = 12343290336. Its totient is φ = 1061788288.

The previous prime is 3981706283. The next prime is 3981706331. The reversal of 3981706320 is 236071893.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8294982 + ... + 8295461.

Almost surely, 2^3981706320 is an apocalyptic number.

3981706320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3981706320 is an abundant number, since it is smaller than the sum of its proper divisors (8361584016).

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

3981706320 is a wasteful number, since it uses less digits than its factorization.

3981706320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16590459 (or 16590453 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 3981706320 is about 63100.7632283477. The cubic root of 3981706320 is about 1584.9774028430.

The spelling of 3981706320 in words is "three billion, nine hundred eighty-one million, seven hundred six thousand, three hundred twenty".