3981678 has 32 divisors (see below), whose sum is σ = 8553600. Its totient is φ = 1231776.

The previous prime is 3981647. The next prime is 3981683. The reversal of 3981678 is 8761893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5713 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (267300).

Almost surely, 2^3981678 is an apocalyptic number.

3981678 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3981678 is an abundant number, since it is smaller than the sum of its proper divisors (4571922).

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

3981678 is a wasteful number, since it uses less digits than its factorization.

3981678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

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

The square root of 3981678 is about 1995.4142427075. The cubic root of 3981678 is about 158.4973645102.

The spelling of 3981678 in words is "three million, nine hundred eighty-one thousand, six hundred seventy-eight".