189264815 has 32 divisors (see below), whose sum is σ = 245379456. Its totient is φ = 139786240.

The previous prime is 189264811. The next prime is 189264839. The reversal of 189264815 is 518462981.

It is not a de Polignac number, because 189264815 - 2² = 189264811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189264811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 645809 + ... + 646101.

It is an arithmetic number, because the mean of its divisors is an integer number (7668108).

Almost surely, 2^189264815 is an apocalyptic number.

189264815 is a deficient number, since it is larger than the sum of its proper divisors (56114641).

189264815 is a wasteful number, since it uses less digits than its factorization.

189264815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499.

The product of its digits is 138240, while the sum is 44.

The square root of 189264815 is about 13757.3549419938. The cubic root of 189264815 is about 574.1472577219.

The spelling of 189264815 in words is "one hundred eighty-nine million, two hundred sixty-four thousand, eight hundred fifteen".