3961810 has 8 divisors (see below), whose sum is σ = 7131276. Its totient is φ = 1584720.

The previous prime is 3961781. The next prime is 3961813. The reversal of 3961810 is 181693.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3916441 + 45369 = 1979^2 + 213^2 .

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

It is a super-2 number, since 2×3961810² = 31391876952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3961813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198081 + ... + 198100.

Almost surely, 2^3961810 is an apocalyptic number.

3961810 is a deficient number, since it is larger than the sum of its proper divisors (3169466).

3961810 is a wasteful number, since it uses less digits than its factorization.

3961810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396188.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3961810 is about 1990.4296018699. The cubic root of 3961810 is about 158.2332984611.

The spelling of 3961810 in words is "three million, nine hundred sixty-one thousand, eight hundred ten".