3403781 has 4 divisors (see below), whose sum is σ = 3415692. Its totient is φ = 3391872.

The previous prime is 3403733. The next prime is 3403783. The reversal of 3403781 is 1873043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2353156 + 1050625 = 1534^2 + 1025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3403781 is a prime.

It is a super-2 number, since 2×3403781² = 23171450191922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3403781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3403783) 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, 5516 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (853923).

Almost surely, 2^3403781 is an apocalyptic number.

It is an amenable number.

3403781 is a deficient number, since it is larger than the sum of its proper divisors (11911).

3403781 is a wasteful number, since it uses less digits than its factorization.

3403781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11910.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 3403781 is about 1844.9338741538. The cubic root of 3403781 is about 150.4251788660.

The spelling of 3403781 in words is "three million, four hundred three thousand, seven hundred eighty-one".