2621680 has 20 divisors (see below), whose sum is σ = 6095592. Its totient is φ = 1048640.

The previous prime is 2621669. The next prime is 2621693. The reversal of 2621680 is 861262.

It is a tau number, because it is divible by the number of its divisors (20).

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16306 + ... + 16465.

2^2621680 is an apocalyptic number.

2621680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2621680 is an abundant number, since it is smaller than the sum of its proper divisors (3473912).

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

2621680 is a wasteful number, since it uses less digits than its factorization.

2621680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32784 (or 32778 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2621680 is about 1619.1602761926. The cubic root of 2621680 is about 137.8880279139. Note that the first 3 decimals are identical.

The spelling of 2621680 in words is "two million, six hundred twenty-one thousand, six hundred eighty".