3661590 has 16 divisors (see below), whose sum is σ = 8787888. Its totient is φ = 976416.

The previous prime is 3661583. The next prime is 3661591. The reversal of 3661590 is 951663.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 122053 = 3661590 / (3 + 6 + 6 + 1 + 5 + 9 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60997 + ... + 61056.

It is an arithmetic number, because the mean of its divisors is an integer number (549243).

Almost surely, 2^3661590 is an apocalyptic number.

3661590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3661590 is an abundant number, since it is smaller than the sum of its proper divisors (5126298).

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

3661590 is a wasteful number, since it uses less digits than its factorization.

3661590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122063.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 3661590 is about 1913.5281550058. The cubic root of 3661590 is about 154.1309674665.

The spelling of 3661590 in words is "three million, six hundred sixty-one thousand, five hundred ninety".