2220816 has 40 divisors (see below), whose sum is σ = 6180160. Its totient is φ = 683136.

The previous prime is 2220787. The next prime is 2220839. The reversal of 2220816 is 6180222.

It is a junction number, because it is equal to n+sod(n) for n = 2220792 and 2220801.

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, 1156 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (154504).

2^2220816 is an apocalyptic number.

2220816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2220816 is an abundant number, since it is smaller than the sum of its proper divisors (3959344).

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

2220816 is a wasteful number, since it uses less digits than its factorization.

2220816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583 (or 3577 counting only the distinct ones).

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

The square root of 2220816 is about 1490.2402490874. The cubic root of 2220816 is about 130.4680563614.

The spelling of 2220816 in words is "two million, two hundred twenty thousand, eight hundred sixteen".