3981490 has 8 divisors (see below), whose sum is σ = 7166700. Its totient is φ = 1592592.

The previous prime is 3981479. The next prime is 3981491. The reversal of 3981490 is 941893.

It can be written as a sum of positive squares in 2 ways, for example, as 3814209 + 167281 = 1953^2 + 409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 199065 + ... + 199084.

Almost surely, 2^3981490 is an apocalyptic number.

3981490 is a deficient number, since it is larger than the sum of its proper divisors (3185210).

3981490 is a wasteful number, since it uses less digits than its factorization.

3981490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398156.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 3981490 is about 1995.3671341385. The cubic root of 3981490 is about 158.4948699192.

The spelling of 3981490 in words is "three million, nine hundred eighty-one thousand, four hundred ninety".