2178528378 has 16 divisors (see below), whose sum is σ = 4692215136. Its totient is φ = 670316400.

The previous prime is 2178528371. The next prime is 2178528397. The reversal of 2178528378 is 8738258712.

2178528378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2178528378.

It is not an unprimeable number, because it can be changed into a prime (2178528371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13964848 + ... + 13965003.

It is an arithmetic number, because the mean of its divisors is an integer number (293263446).

Almost surely, 2^2178528378 is an apocalyptic number.

2178528378 is an abundant number, since it is smaller than the sum of its proper divisors (2513686758).

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

2178528378 is a wasteful number, since it uses less digits than its factorization.

2178528378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27929869.

The product of its digits is 1505280, while the sum is 51.

The square root of 2178528378 is about 46674.7081190659. The cubic root of 2178528378 is about 1296.3464235005.

The spelling of 2178528378 in words is "two billion, one hundred seventy-eight million, five hundred twenty-eight thousand, three hundred seventy-eight".