2222478 has 48 divisors (see below), whose sum is σ = 5307120. Its totient is φ = 694656.

The previous prime is 2222477. The next prime is 2222501. The reversal of 2222478 is 8742222.

2222478 is digitally balanced in base 2, 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 (27).

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8128 + ... + 8396.

It is an arithmetic number, because the mean of its divisors is an integer number (110565).

2^2222478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2222478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2653560).

2222478 is an abundant number, since it is smaller than the sum of its proper divisors (3084642).

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

2222478 is a wasteful number, since it uses less digits than its factorization.

2222478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 291 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 2222478 is about 1490.7977730061. The cubic root of 2222478 is about 130.5005945276.

It can be divided in two parts, 22 and 22478, that added together give a square (22500 = 150²).

The spelling of 2222478 in words is "two million, two hundred twenty-two thousand, four hundred seventy-eight".