3698781 has 8 divisors (see below), whose sum is σ = 4950624. Its totient is φ = 2456400.

The previous prime is 3698771. The next prime is 3698789. The reversal of 3698781 is 1878963.

3698781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3698781 - 2¹¹ = 3696733 is a prime.

It is a super-2 number, since 2×3698781² = 27361961771922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3698789) 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 7 ways as a sum of consecutive naturals, for example, 1395 + ... + 3056.

It is an arithmetic number, because the mean of its divisors is an integer number (618828).

Almost surely, 2^3698781 is an apocalyptic number.

It is an amenable number.

3698781 is a deficient number, since it is larger than the sum of its proper divisors (1251843).

3698781 is a wasteful number, since it uses less digits than its factorization.

3698781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731.

The product of its digits is 72576, while the sum is 42.

The square root of 3698781 is about 1923.2215161026. The cubic root of 3698781 is about 154.6510498955.

The spelling of 3698781 in words is "three million, six hundred ninety-eight thousand, seven hundred eighty-one".