78429589 has 8 divisors (see below), whose sum is σ = 89723520. Its totient is φ = 67158096.

The previous prime is 78429553. The next prime is 78429599. The reversal of 78429589 is 98592487.

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 78429589 - 2⁹ = 78429077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78429539) 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, 2712 + ... + 12814.

It is an arithmetic number, because the mean of its divisors is an integer number (11215440).

Almost surely, 2^78429589 is an apocalyptic number.

It is an amenable number.

78429589 is a deficient number, since it is larger than the sum of its proper divisors (11293931).

78429589 is a wasteful number, since it uses less digits than its factorization.

78429589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11219.

The product of its digits is 1451520, while the sum is 52.

The square root of 78429589 is about 8856.0481593090. The cubic root of 78429589 is about 428.0488287523.

The spelling of 78429589 in words is "seventy-eight million, four hundred twenty-nine thousand, five hundred eighty-nine".