189349815 has 8 divisors (see below), whose sum is σ = 302959728. Its totient is φ = 100986560.

The previous prime is 189349799. The next prime is 189349817. The reversal of 189349815 is 518943981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189349815 - 2⁴ = 189349799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189349817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6311646 + ... + 6311675.

It is an arithmetic number, because the mean of its divisors is an integer number (37869966).

Almost surely, 2^189349815 is an apocalyptic number.

189349815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189349815 is a deficient number, since it is larger than the sum of its proper divisors (113609913).

189349815 is a wasteful number, since it uses less digits than its factorization.

189349815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12623329.

The product of its digits is 311040, while the sum is 48.

The square root of 189349815 is about 13760.4438518530. The cubic root of 189349815 is about 574.2331958872.

The spelling of 189349815 in words is "one hundred eighty-nine million, three hundred forty-nine thousand, eight hundred fifteen".