2178578412 has 36 divisors (see below), whose sum is σ = 5521526920. Its totient is φ = 724272192.

The previous prime is 2178578411. The next prime is 2178578473. The reversal of 2178578412 is 2148758712.

2178578412 is a `hidden beast` number, since 2 + 1 + 78 + 578 + 4 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2178578411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66193 + ... + 93480.

Almost surely, 2^2178578412 is an apocalyptic number.

It is an amenable number.

2178578412 is an abundant number, since it is smaller than the sum of its proper divisors (3342948508).

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

2178578412 is a wasteful number, since it uses less digits than its factorization.

2178578412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160062 (or 160057 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 2178578412 is about 46675.2441022005. The cubic root of 2178578412 is about 1296.3563477688.

The spelling of 2178578412 in words is "two billion, one hundred seventy-eight million, five hundred seventy-eight thousand, four hundred twelve".