3728681 has 8 divisors (see below), whose sum is σ = 4082400. Its totient is φ = 3377440.

The previous prime is 3728671. The next prime is 3728687. The reversal of 3728681 is 1868273.

3728681 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 3728681 - 2¹⁴ = 3712297 is a prime.

It is a super-2 number, since 2×3728681² = 27806123999522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3728687) 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, 4205 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (510300).

Almost surely, 2^3728681 is an apocalyptic number.

It is an amenable number.

3728681 is a deficient number, since it is larger than the sum of its proper divisors (353719).

3728681 is a wasteful number, since it uses less digits than its factorization.

3728681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239.

The product of its digits is 16128, while the sum is 35.

The square root of 3728681 is about 1930.9792852333. The cubic root of 3728681 is about 155.0666518759.

The spelling of 3728681 in words is "three million, seven hundred twenty-eight thousand, six hundred eighty-one".