145489194 has 48 divisors (see below), whose sum is σ = 333871200. Its totient is φ = 45659808.

The previous prime is 145489193. The next prime is 145489207. The reversal of 145489194 is 491984541.

It is a happy number.

145489194 is a `hidden beast` number, since 1 + 454 + 8 + 9 + 194 = 666.

145489194 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 (145489193) 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, 57937 + ... + 60395.

It is an arithmetic number, because the mean of its divisors is an integer number (6955650).

Almost surely, 2^145489194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145489194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166935600).

145489194 is an abundant number, since it is smaller than the sum of its proper divisors (188382006).

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

145489194 is a wasteful number, since it uses less digits than its factorization.

145489194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659 (or 2656 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 145489194 is about 12061.8901503869. The cubic root of 145489194 is about 525.9489341144.

The spelling of 145489194 in words is "one hundred forty-five million, four hundred eighty-nine thousand, one hundred ninety-four".