3913780 has 24 divisors (see below), whose sum is σ = 8851752. Its totient is φ = 1444992.

The previous prime is 3913771. The next prime is 3913787. The reversal of 3913780 is 873193.

It can be written as a sum of positive squares in 4 ways, for example, as 630436 + 3283344 = 794^2 + 1812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3913787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7267 + ... + 7786.

It is an arithmetic number, because the mean of its divisors is an integer number (368823).

Almost surely, 2^3913780 is an apocalyptic number.

It is an amenable number.

3913780 is an abundant number, since it is smaller than the sum of its proper divisors (4937972).

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

3913780 is a wasteful number, since it uses less digits than its factorization.

3913780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15075 (or 15073 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 3913780 is about 1978.3275765151. The cubic root of 3913780 is about 157.5912631401.

The spelling of 3913780 in words is "three million, nine hundred thirteen thousand, seven hundred eighty".