3939780 has 48 divisors (see below), whose sum is σ = 11882304. Its totient is φ = 969600.

The previous prime is 3939779. The next prime is 3939781. The reversal of 3939780 is 879393.

It is a happy number.

3939780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3939779) and next prime (3939781).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3939781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1746 + ... + 3305.

It is an arithmetic number, because the mean of its divisors is an integer number (247548).

Almost surely, 2^3939780 is an apocalyptic number.

3939780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3939780 is an abundant number, since it is smaller than the sum of its proper divisors (7942524).

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

3939780 is a wasteful number, since it uses less digits than its factorization.

3939780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076 (or 5074 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 3939780 is about 1984.8879061549. The cubic root of 3939780 is about 157.9394630019.

The spelling of 3939780 in words is "three million, nine hundred thirty-nine thousand, seven hundred eighty".