3980665 has 16 divisors (see below), whose sum is σ = 5257728. Its totient is φ = 2874816.

The previous prime is 3980663. The next prime is 3980687. The reversal of 3980665 is 5660893.

It is a cyclic number.

It is not a de Polignac number, because 3980665 - 2¹ = 3980663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3980663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2404 + ... + 3706.

It is an arithmetic number, because the mean of its divisors is an integer number (328608).

Almost surely, 2^3980665 is an apocalyptic number.

It is an amenable number.

3980665 is a deficient number, since it is larger than the sum of its proper divisors (1277063).

3980665 is a wasteful number, since it uses less digits than its factorization.

3980665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 3980665 is about 1995.1603945548. The cubic root of 3980665 is about 158.4839219827.

The spelling of 3980665 in words is "three million, nine hundred eighty thousand, six hundred sixty-five".