3520989 has 20 divisors (see below), whose sum is σ = 5571324. Its totient is φ = 2208384.

The previous prime is 3520987. The next prime is 3520991. The reversal of 3520989 is 9890253.

It is an interprime number because it is at equal distance from previous prime (3520987) and next prime (3520991).

It can be written as a sum of positive squares in 2 ways, for example, as 2152089 + 1368900 = 1467^2 + 1170^2 .

It is not a de Polignac number, because 3520989 - 2¹ = 3520987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520987) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99 + ... + 2655.

Almost surely, 2^3520989 is an apocalyptic number.

It is an amenable number.

3520989 is a deficient number, since it is larger than the sum of its proper divisors (2050335).

3520989 is a wasteful number, since it uses less digits than its factorization.

3520989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586 (or 2577 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 3520989 is about 1876.4298548041. The cubic root of 3520989 is about 152.1323437630.

The spelling of 3520989 in words is "three million, five hundred twenty thousand, nine hundred eighty-nine".