3643620 has 24 divisors (see below), whose sum is σ = 10202304. Its totient is φ = 971616.

The previous prime is 3643613. The next prime is 3643621. The reversal of 3643620 is 263463.

It is not an unprimeable number, because it can be changed into a prime (3643621) 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, 30304 + ... + 30423.

It is an arithmetic number, because the mean of its divisors is an integer number (425096).

Almost surely, 2^3643620 is an apocalyptic number.

3643620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3643620 is an abundant number, since it is smaller than the sum of its proper divisors (6558684).

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

3643620 is a wasteful number, since it uses less digits than its factorization.

3643620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60739 (or 60737 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 3643620 is about 1908.8268648571. The cubic root of 3643620 is about 153.8784108003.

The spelling of 3643620 in words is "three million, six hundred forty-three thousand, six hundred twenty".