3981402 has 24 divisors (see below), whose sum is σ = 8664084. Its totient is φ = 1321344.

The previous prime is 3981401. The next prime is 3981403. The reversal of 3981402 is 2041893.

It is an interprime number because it is at equal distance from previous prime (3981401) and next prime (3981403).

It can be written as a sum of positive squares in 2 ways, for example, as 3956121 + 25281 = 1989^2 + 159^2 .

It is not an unprimeable number, because it can be changed into a prime (3981401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6418 + ... + 7010.

Almost surely, 2^3981402 is an apocalyptic number.

3981402 is an abundant number, since it is smaller than the sum of its proper divisors (4682682).

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

3981402 is a wasteful number, since it uses less digits than its factorization.

3981402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 3981402 is about 1995.3450829368. The cubic root of 3981402 is about 158.4937022114.

The spelling of 3981402 in words is "three million, nine hundred eighty-one thousand, four hundred two".