3951646 has 4 divisors (see below), whose sum is σ = 5927472. Its totient is φ = 1975822.

The previous prime is 3951611. The next prime is 3951707. The reversal of 3951646 is 6461593.

3951646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6461593 = 383 ⋅16871.

It is a super-2 number, since 2×3951646² = 31231012218632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987910 + ... + 987913.

It is an arithmetic number, because the mean of its divisors is an integer number (1481868).

Almost surely, 2^3951646 is an apocalyptic number.

3951646 is a deficient number, since it is larger than the sum of its proper divisors (1975826).

3951646 is a wasteful number, since it uses less digits than its factorization.

3951646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975825.

The product of its digits is 19440, while the sum is 34.

The square root of 3951646 is about 1987.8747445450. The cubic root of 3951646 is about 158.0978670500.

The spelling of 3951646 in words is "three million, nine hundred fifty-one thousand, six hundred forty-six".