2251844478 has 48 divisors (see below), whose sum is σ = 5277373920. Its totient is φ = 689833152.

The previous prime is 2251844459. The next prime is 2251844479. The reversal of 2251844478 is 8744481522.

2251844478 is a `hidden beast` number, since 2 + 25 + 184 + 447 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251844479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32575 + ... + 74597.

It is an arithmetic number, because the mean of its divisors is an integer number (109945290).

Almost surely, 2^2251844478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2251844478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2638686960).

2251844478 is an abundant number, since it is smaller than the sum of its proper divisors (3025529442).

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

2251844478 is a wasteful number, since it uses less digits than its factorization.

2251844478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42273 (or 42270 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The square root of 2251844478 is about 47453.6034248191. The cubic root of 2251844478 is about 1310.7286659603.

The spelling of 2251844478 in words is "two billion, two hundred fifty-one million, eight hundred forty-four thousand, four hundred seventy-eight".