2220456 has 32 divisors (see below), whose sum is σ = 6344640. Its totient is φ = 634368.

The previous prime is 2220431. The next prime is 2220457. The reversal of 2220456 is 6540222.

2220456 = T₇₉₃ + T₇₉₄ + ... + T₇₉₉.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2220457) 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, 6441 + ... + 6776.

It is an arithmetic number, because the mean of its divisors is an integer number (198270).

2^2220456 is an apocalyptic number.

It is an amenable number.

2220456 is an abundant number, since it is smaller than the sum of its proper divisors (4124184).

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

2220456 is a wasteful number, since it uses less digits than its factorization.

2220456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13233 (or 13229 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2220456 is about 1490.1194582986. The cubic root of 2220456 is about 130.4610062443.

Adding to 2220456 its reverse (6540222), we get a palindrome (8760678).

The spelling of 2220456 in words is "two million, two hundred twenty thousand, four hundred fifty-six".