189015387 has 8 divisors (see below), whose sum is σ = 274931520. Its totient is φ = 114554760.

The previous prime is 189015383. The next prime is 189015413. The reversal of 189015387 is 783510981.

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

It is not a de Polignac number, because 189015387 - 2² = 189015383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189015383) 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 7 ways as a sum of consecutive naturals, for example, 2863837 + ... + 2863902.

It is an arithmetic number, because the mean of its divisors is an integer number (34366440).

Almost surely, 2^189015387 is an apocalyptic number.

189015387 is a deficient number, since it is larger than the sum of its proper divisors (85916133).

189015387 is a wasteful number, since it uses less digits than its factorization.

189015387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5727753.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 189015387 is about 13748.2866932575. The cubic root of 189015387 is about 573.8949280981.

The spelling of 189015387 in words is "one hundred eighty-nine million, fifteen thousand, three hundred eighty-seven".