30494178 has 96 divisors (see below), whose sum is σ = 80438400. Its totient is φ = 8506080.

The previous prime is 30494171. The next prime is 30494213. The reversal of 30494178 is 87149403.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (30494171) 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 47 ways as a sum of consecutive naturals, for example, 84763 + ... + 85121.

It is an arithmetic number, because the mean of its divisors is an integer number (837900).

Almost surely, 2^30494178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30494178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40219200).

30494178 is an abundant number, since it is smaller than the sum of its proper divisors (49944222).

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

30494178 is a wasteful number, since it uses less digits than its factorization.

30494178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 30494178 is about 5522.1533843239. The cubic root of 30494178 is about 312.4201071499.

It can be divided in two parts, 3049 and 4178, that added together give a palindrome (7227).

The spelling of 30494178 in words is "thirty million, four hundred ninety-four thousand, one hundred seventy-eight".