2273778 has 64 divisors (see below), whose sum is σ = 5644800. Its totient is φ = 673920.

The previous prime is 2273771. The next prime is 2273783. The reversal of 2273778 is 8773722.

2273778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2273778 is a nontrivial binomial coefficient, being equal to C(2133, 2).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2273771) 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 31 ways as a sum of consecutive naturals, for example, 28743 + ... + 28821.

It is an arithmetic number, because the mean of its divisors is an integer number (88200).

2^2273778 is an apocalyptic number.

2273778 is the 2132-nd triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2273778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2822400).

2273778 is an abundant number, since it is smaller than the sum of its proper divisors (3371022).

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

2273778 is a wasteful number, since it uses less digits than its factorization.

2273778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 138 counting only the distinct ones).

The product of its digits is 32928, while the sum is 36.

The square root of 2273778 is about 1507.9051694321. The cubic root of 2273778 is about 131.4970530454.

It can be divided in two parts, 227 and 3778, that added together give a triangular number (4005 = T₈₉).

The spelling of 2273778 in words is "two million, two hundred seventy-three thousand, seven hundred seventy-eight".