3581658 has 20 divisors (see below), whose sum is σ = 8025930. Its totient is φ = 1193832.

The previous prime is 3581651. The next prime is 3581663. The reversal of 3581658 is 8561853.

It can be written as a sum of positive squares in only one way, i.e., 3470769 + 110889 = 1863^2 + 333^2 .

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3581651) 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 9 ways as a sum of consecutive naturals, for example, 10893 + ... + 11216.

Almost surely, 2^3581658 is an apocalyptic number.

3581658 is an abundant number, since it is smaller than the sum of its proper divisors (4444272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3581658 is a wasteful number, since it uses less digits than its factorization.

3581658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22123 (or 22114 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 3581658 is about 1892.5268822397. The cubic root of 3581658 is about 153.0011533938.

It can be divided in two parts, 358 and 1658, that added together give a triangular number (2016 = T₆₃).

The spelling of 3581658 in words is "three million, five hundred eighty-one thousand, six hundred fifty-eight".