189005445 has 24 divisors (see below), whose sum is σ = 344853600. Its totient is φ = 95497056.

The previous prime is 189005429. The next prime is 189005461. The reversal of 189005445 is 544500981.

It is an interprime number because it is at equal distance from previous prime (189005429) and next prime (189005461).

It is not a de Polignac number, because 189005445 - 2⁴ = 189005429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109675 + ... + 111384.

It is an arithmetic number, because the mean of its divisors is an integer number (14368900).

Almost surely, 2^189005445 is an apocalyptic number.

189005445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189005445 is a deficient number, since it is larger than the sum of its proper divisors (155848155).

189005445 is a wasteful number, since it uses less digits than its factorization.

189005445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221089 (or 221086 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 189005445 is about 13747.9251161766. The cubic root of 189005445 is about 573.8848658424.

The spelling of 189005445 in words is "one hundred eighty-nine million, five thousand, four hundred forty-five".