3981492 has 18 divisors (see below), whose sum is σ = 10064418. Its totient is φ = 1327152.

The previous prime is 3981491. The next prime is 3981503. The reversal of 3981492 is 2941893.

It can be written as a sum of positive squares in only one way, i.e., 3663396 + 318096 = 1914^2 + 564^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 110597 = 3981492 / (3 + 9 + 8 + 1 + 4 + 9 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55263 + ... + 55334.

Almost surely, 2^3981492 is an apocalyptic number.

It is an amenable number.

3981492 is an abundant number, since it is smaller than the sum of its proper divisors (6082926).

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

3981492 is a wasteful number, since it uses less digits than its factorization.

3981492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110607 (or 110602 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 3981492 is about 1995.3676352993. The cubic root of 3981492 is about 158.4948964579.

The spelling of 3981492 in words is "three million, nine hundred eighty-one thousand, four hundred ninety-two".