3621680 has 40 divisors (see below), whose sum is σ = 8919072. Its totient is φ = 1362944.

The previous prime is 3621661. The next prime is 3621691. The reversal of 3621680 is 861263.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 2691.

Almost surely, 2^3621680 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 3621680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4459536).

3621680 is an abundant number, since it is smaller than the sum of its proper divisors (5297392).

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

3621680 is a wasteful number, since it uses less digits than its factorization.

3621680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693 (or 2687 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3621680 is about 1903.0712020311. The cubic root of 3621680 is about 153.5689299859.

The spelling of 3621680 in words is "three million, six hundred twenty-one thousand, six hundred eighty".