393240189 has 8 divisors (see below), whose sum is σ = 525097440. Its totient is φ = 261771536.

The previous prime is 393240187. The next prime is 393240193. The reversal of 393240189 is 981042393.

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

It is a cyclic number.

It is not a de Polignac number, because 393240189 - 2¹ = 393240187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393240187) 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, 94779 + ... + 98840.

It is an arithmetic number, because the mean of its divisors is an integer number (65637180).

Almost surely, 2^393240189 is an apocalyptic number.

It is an amenable number.

393240189 is a deficient number, since it is larger than the sum of its proper divisors (131857251).

393240189 is a wasteful number, since it uses less digits than its factorization.

393240189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194299.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 393240189 is about 19830.2846424352. The cubic root of 393240189 is about 732.6321374374.

The spelling of 393240189 in words is "three hundred ninety-three million, two hundred forty thousand, one hundred eighty-nine".