2178538752 has 144 divisors (see below), whose sum is σ = 6302616768. Its totient is φ = 664043520.

The previous prime is 2178538723. The next prime is 2178538753. The reversal of 2178538752 is 2578358712.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2178538753) 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 15 ways as a sum of consecutive naturals, for example, 1127227 + ... + 1129157.

It is an arithmetic number, because the mean of its divisors is an integer number (43768172).

Almost surely, 2^2178538752 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 2178538752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3151308384).

2178538752 is an abundant number, since it is smaller than the sum of its proper divisors (4124078016).

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

2178538752 is a wasteful number, since it uses less digits than its factorization.

2178538752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076 (or 2062 counting only the distinct ones).

The product of its digits is 940800, while the sum is 48.

The square root of 2178538752 is about 46674.8192497839. The cubic root of 2178538752 is about 1296.3484812009.

The spelling of 2178538752 in words is "two billion, one hundred seventy-eight million, five hundred thirty-eight thousand, seven hundred fifty-two".