378491172 has 72 divisors (see below), whose sum is σ = 955255392. Its totient is φ = 116553600.

The previous prime is 378491171. The next prime is 378491221. The reversal of 378491172 is 271194873.

378491172 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (378491171) 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 23 ways as a sum of consecutive naturals, for example, 176547 + ... + 178677.

It is an arithmetic number, because the mean of its divisors is an integer number (13267436).

Almost surely, 2^378491172 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 378491172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477627696).

378491172 is an abundant number, since it is smaller than the sum of its proper divisors (576764220).

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

378491172 is a wasteful number, since it uses less digits than its factorization.

378491172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217 (or 2196 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 378491172 is about 19454.8495753630. The cubic root of 378491172 is about 723.3557168257.

The spelling of 378491172 in words is "three hundred seventy-eight million, four hundred ninety-one thousand, one hundred seventy-two".