3959780 has 48 divisors (see below), whose sum is σ = 9313920. Its totient is φ = 1401600.

The previous prime is 3959729. The next prime is 3959801. The reversal of 3959780 is 879593.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8801 + ... + 9239.

It is an arithmetic number, because the mean of its divisors is an integer number (194040).

Almost surely, 2^3959780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3959780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4656960).

3959780 is an abundant number, since it is smaller than the sum of its proper divisors (5354140).

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

3959780 is a wasteful number, since it uses less digits than its factorization.

3959780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 3959780 is about 1989.9195963656. The cubic root of 3959780 is about 158.2062680151.

3959780 divided by its sum of digits (41) gives a triangular number (96580 = T₄₃₉).

The spelling of 3959780 in words is "three million, nine hundred fifty-nine thousand, seven hundred eighty".