189511245 has 160 divisors (see below), whose sum is σ = 434903040. Its totient is φ = 76671360.

The previous prime is 189511241. The next prime is 189511247. The reversal of 189511245 is 542115981.

It is not a de Polignac number, because 189511245 - 2² = 189511241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189511241) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1839864 + ... + 1839966.

It is an arithmetic number, because the mean of its divisors is an integer number (2718144).

Almost surely, 2^189511245 is an apocalyptic number.

189511245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189511245 is an abundant number, since it is smaller than the sum of its proper divisors (245391795).

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

189511245 is a wasteful number, since it uses less digits than its factorization.

189511245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 188 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 189511245 is about 13766.3083286697. The cubic root of 189511245 is about 574.3963368510.

The spelling of 189511245 in words is "one hundred eighty-nine million, five hundred eleven thousand, two hundred forty-five".