3667989 has 16 divisors (see below), whose sum is σ = 5308352. Its totient is φ = 2239488.

The previous prime is 3667987. The next prime is 3667997. The reversal of 3667989 is 9897663.

It is a happy number.

It is not a de Polignac number, because 3667989 - 2¹ = 3667987 is a prime.

It is a Duffinian number.

Its product of digits (489888) is a multiple of the sum of its prime divisors (756).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3667981) 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 15 ways as a sum of consecutive naturals, for example, 6069 + ... + 6645.

It is an arithmetic number, because the mean of its divisors is an integer number (331772).

Almost surely, 2^3667989 is an apocalyptic number.

3667989 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3667989 is a deficient number, since it is larger than the sum of its proper divisors (1640363).

3667989 is a wasteful number, since it uses less digits than its factorization.

3667989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its digits is 489888, while the sum is 48.

The square root of 3667989 is about 1915.1994674185. The cubic root of 3667989 is about 154.2207017144.

It can be divided in two parts, 3667 and 989, that added together give a triangular number (4656 = T₉₆).

The spelling of 3667989 in words is "three million, six hundred sixty-seven thousand, nine hundred eighty-nine".