3664820 has 48 divisors (see below), whose sum is σ = 8322048. Its totient is φ = 1351680.

The previous prime is 3664811. The next prime is 3664823. The reversal of 3664820 is 284663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3664823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14132 + ... + 14388.

It is an arithmetic number, because the mean of its divisors is an integer number (173376).

Almost surely, 2^3664820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3664820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4161024).

3664820 is an abundant number, since it is smaller than the sum of its proper divisors (4657228).

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

3664820 is a wasteful number, since it uses less digits than its factorization.

3664820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 3664820 is about 1914.3719596776. The cubic root of 3664820 is about 154.1762753527.

The spelling of 3664820 in words is "three million, six hundred sixty-four thousand, eight hundred twenty".