3967845 has 64 divisors (see below), whose sum is σ = 7962624. Its totient is φ = 1647360.

The previous prime is 3967841. The next prime is 3967871. The reversal of 3967845 is 5487693.

It is a happy number.

It is not a de Polignac number, because 3967845 - 2² = 3967841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3967797 and 3967806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74839 + ... + 74891.

It is an arithmetic number, because the mean of its divisors is an integer number (124416).

Almost surely, 2^3967845 is an apocalyptic number.

3967845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3967845 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

3967845 is a wasteful number, since it uses less digits than its factorization.

3967845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122.

The product of its digits is 181440, while the sum is 42.

The square root of 3967845 is about 1991.9450293620. The cubic root of 3967845 is about 158.3136029585.

The spelling of 3967845 in words is "three million, nine hundred sixty-seven thousand, eight hundred forty-five".