3981456 has 60 divisors (see below), whose sum is σ = 11419408. Its totient is φ = 1294272.

The previous prime is 3981449. The next prime is 3981463. The reversal of 3981456 is 6541893.

It is an interprime number because it is at equal distance from previous prime (3981449) and next prime (3981463).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3981456.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5871 + ... + 6513.

Almost surely, 2^3981456 is an apocalyptic number.

3981456 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3981456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5709704).

3981456 is an abundant number, since it is smaller than the sum of its proper divisors (7437952).

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

3981456 is a wasteful number, since it uses less digits than its factorization.

3981456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 691 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3981456 is about 1995.3586143849. The cubic root of 3981456 is about 158.4944187614.

The spelling of 3981456 in words is "three million, nine hundred eighty-one thousand, four hundred fifty-six".