4013780 has 12 divisors (see below), whose sum is σ = 8428980. Its totient is φ = 1605504.

The previous prime is 4013761. The next prime is 4013783. The reversal of 4013780 is 873104.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1592644 + 2421136 = 1262^2 + 1556^2 .

It is a super-2 number, since 2×4013780² = 32220859776800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100325 + ... + 100364.

It is an arithmetic number, because the mean of its divisors is an integer number (702415).

Almost surely, 2^4013780 is an apocalyptic number.

It is an amenable number.

4013780 is an abundant number, since it is smaller than the sum of its proper divisors (4415200).

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

4013780 is a wasteful number, since it uses less digits than its factorization.

4013780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200698 (or 200696 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 4013780 is about 2003.4420380934. The cubic root of 4013780 is about 158.9221828249.

Adding to 4013780 its reverse (873104), we get a palindrome (4886884).

The spelling of 4013780 in words is "four million, thirteen thousand, seven hundred eighty".