3921670 has 16 divisors (see below), whose sum is σ = 7302960. Its totient is φ = 1514464.

The previous prime is 3921649. The next prime is 3921677. The reversal of 3921670 is 761293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921677) 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 7 ways as a sum of consecutive naturals, for example, 6472 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (456435).

Almost surely, 2^3921670 is an apocalyptic number.

3921670 is a deficient number, since it is larger than the sum of its proper divisors (3381290).

3921670 is a wasteful number, since it uses less digits than its factorization.

3921670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13559.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 3921670 is about 1980.3206811019. The cubic root of 3921670 is about 157.6970909637.

The spelling of 3921670 in words is "three million, nine hundred twenty-one thousand, six hundred seventy".