2220864 has 56 divisors (see below), whose sum is σ = 6035040. Its totient is φ = 720384.

The previous prime is 2220839. The next prime is 2220887. The reversal of 2220864 is 4680222.

2220864 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a d-powerful number, because it can be written as 2⁸ + 2¹⁴ + 2¹⁹ + 0 + 8² + 6⁸ + 4⁴ .

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, 8122 + ... + 8390.

2^2220864 is an apocalyptic number.

2220864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2220864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3017520).

2220864 is an abundant number, since it is smaller than the sum of its proper divisors (3814176).

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

2220864 is a wasteful number, since it uses less digits than its factorization.

2220864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 2220864 is about 1490.2563537862. The cubic root of 2220864 is about 130.4689963195.

The spelling of 2220864 in words is "two million, two hundred twenty thousand, eight hundred sixty-four".