2221680 has 40 divisors (see below), whose sum is σ = 6887952. Its totient is φ = 592384.

The previous prime is 2221673. The next prime is 2221699. The reversal of 2221680 is 861222.

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

It is a congruent number.

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, 4389 + ... + 4868.

2^2221680 is an apocalyptic number.

2221680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221680 is an abundant number, since it is smaller than the sum of its proper divisors (4666272).

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

2221680 is a wasteful number, since it uses less digits than its factorization.

2221680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9273 (or 9267 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 2221680 is about 1490.5301070425. The cubic root of 2221680 is about 130.4849735344.

The spelling of 2221680 in words is "two million, two hundred twenty-one thousand, six hundred eighty".