78432159 has 8 divisors (see below), whose sum is σ = 112620592. Its totient is φ = 48265920.

The previous prime is 78432157. The next prime is 78432173. The reversal of 78432159 is 95123487.

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

It is not a de Polignac number, because 78432159 - 2¹ = 78432157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2011081 = 78432159 / (7 + 8 + 4 + 3 + 2 + 1 + 5 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78432157) 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, 1005502 + ... + 1005579.

It is an arithmetic number, because the mean of its divisors is an integer number (14077574).

Almost surely, 2^78432159 is an apocalyptic number.

78432159 is a deficient number, since it is larger than the sum of its proper divisors (34188433).

78432159 is a wasteful number, since it uses less digits than its factorization.

78432159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011097.

The product of its digits is 60480, while the sum is 39.

The square root of 78432159 is about 8856.1932566990. The cubic root of 78432159 is about 428.0535041709.

The spelling of 78432159 in words is "seventy-eight million, four hundred thirty-two thousand, one hundred fifty-nine".