3660820 has 12 divisors (see below), whose sum is σ = 7687764. Its totient is φ = 1464320.

The previous prime is 3660799. The next prime is 3660823. The reversal of 3660820 is 280663.

3660820 = 487² + 488² + ... + 501².

It can be written as a sum of positive squares in 2 ways, for example, as 2108304 + 1552516 = 1452^2 + 1246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3660823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91501 + ... + 91540.

It is an arithmetic number, because the mean of its divisors is an integer number (640647).

Almost surely, 2^3660820 is an apocalyptic number.

It is an amenable number.

3660820 is an abundant number, since it is smaller than the sum of its proper divisors (4026944).

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

3660820 is a wasteful number, since it uses less digits than its factorization.

3660820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183050 (or 183048 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 3660820 is about 1913.3269454016. The cubic root of 3660820 is about 154.1201625826.

The spelling of 3660820 in words is "three million, six hundred sixty thousand, eight hundred twenty".