3981720732 has 48 divisors (see below), whose sum is σ = 10228310400. Its totient is φ = 1195508160.

The previous prime is 3981720727. The next prime is 3981720767. The reversal of 3981720732 is 2370271893.

It is a congruent number.

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, 123982 + ... + 152757.

It is an arithmetic number, because the mean of its divisors is an integer number (213089800).

Almost surely, 2^3981720732 is an apocalyptic number.

It is an amenable number.

3981720732 is an abundant number, since it is smaller than the sum of its proper divisors (6246589668).

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

3981720732 is a wasteful number, since it uses less digits than its factorization.

3981720732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276866 (or 276864 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 3981720732 is about 63100.8774265461. The cubic root of 3981720732 is about 1584.9793151443.

The spelling of 3981720732 in words is "three billion, nine hundred eighty-one million, seven hundred twenty thousand, seven hundred thirty-two".