2112178432 has 144 divisors (see below), whose sum is σ = 5266259712. Its totient is φ = 823173120.

The previous prime is 2112178429. The next prime is 2112178433. The reversal of 2112178432 is 2348712112.

It is a super-2 number, since 2×2112178432² = 8922595457211957248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112178394 and 2112178403.

It is not an unprimeable number, because it can be changed into a prime (2112178433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1653378 + ... + 1654654.

It is an arithmetic number, because the mean of its divisors is an integer number (36571248).

Almost surely, 2^2112178432 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 2112178432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2633129856).

2112178432 is an abundant number, since it is smaller than the sum of its proper divisors (3154081280).

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

2112178432 is a wasteful number, since it uses less digits than its factorization.

2112178432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1370 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 2112178432 is about 45958.4424453223. The cubic root of 2112178432 is about 1283.0498627211.

The spelling of 2112178432 in words is "two billion, one hundred twelve million, one hundred seventy-eight thousand, four hundred thirty-two".