2178474792 has 128 divisors (see below), whose sum is σ = 6537283200. Its totient is φ = 597639168.

The previous prime is 2178474787. The next prime is 2178474797. The reversal of 2178474792 is 2974748712.

It is an interprime number because it is at equal distance from previous prime (2178474787) and next prime (2178474797).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2178474797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89968 + ... + 111584.

It is an arithmetic number, because the mean of its divisors is an integer number (51072525).

Almost surely, 2^2178474792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2178474792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3268641600).

2178474792 is an abundant number, since it is smaller than the sum of its proper divisors (4358808408).

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

2178474792 is a wasteful number, since it uses less digits than its factorization.

2178474792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21675 (or 21671 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 2178474792 is about 46674.1340787379. The cubic root of 2178474792 is about 1296.3357945227.

The spelling of 2178474792 in words is "two billion, one hundred seventy-eight million, four hundred seventy-four thousand, seven hundred ninety-two".