78364589 has 8 divisors (see below), whose sum is σ = 79704000. Its totient is φ = 77035552.

The previous prime is 78364579. The next prime is 78364609. The reversal of 78364589 is 98546387.

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

It is a de Polignac number, because none of the positive numbers 2^k-78364589 is a prime.

It is a super-2 number, since 2×78364589² = 12282017618277842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78364549) 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, 13472 + ... + 18390.

It is an arithmetic number, because the mean of its divisors is an integer number (9963000).

Almost surely, 2^78364589 is an apocalyptic number.

It is an amenable number.

78364589 is a deficient number, since it is larger than the sum of its proper divisors (1339411).

78364589 is a wasteful number, since it uses less digits than its factorization.

78364589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187.

The product of its digits is 1451520, while the sum is 50.

The square root of 78364589 is about 8852.3775902296. The cubic root of 78364589 is about 427.9305448917.

The spelling of 78364589 in words is "seventy-eight million, three hundred sixty-four thousand, five hundred eighty-nine".