178428012 has 72 divisors (see below), whose sum is σ = 509826240. Its totient is φ = 48293280.

The previous prime is 178428011. The next prime is 178428071. The reversal of 178428012 is 210824871.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (178428011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3187 + ... + 19157.

It is an arithmetic number, because the mean of its divisors is an integer number (7080920).

Almost surely, 2^178428012 is an apocalyptic number.

178428012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 178428012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254913120).

178428012 is an abundant number, since it is smaller than the sum of its proper divisors (331398228).

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

178428012 is a wasteful number, since it uses less digits than its factorization.

178428012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16011 (or 16002 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 178428012 is about 13357.6948610155. The cubic root of 178428012 is about 562.9731454096.

The spelling of 178428012 in words is "one hundred seventy-eight million, four hundred twenty-eight thousand, twelve".