78060389 has 4 divisors (see below), whose sum is σ = 85156800. Its totient is φ = 70963980.

The previous prime is 78060383. The next prime is 78060397. The reversal of 78060389 is 98306087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78060389 - 2²⁰ = 77011813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78060383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3548189 + ... + 3548210.

It is an arithmetic number, because the mean of its divisors is an integer number (21289200).

Almost surely, 2^78060389 is an apocalyptic number.

It is an amenable number.

78060389 is a deficient number, since it is larger than the sum of its proper divisors (7096411).

78060389 is a wasteful number, since it uses less digits than its factorization.

78060389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096410.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 78060389 is about 8835.1790587401. The cubic root of 78060389 is about 427.3761053602.

The spelling of 78060389 in words is "seventy-eight million, sixty thousand, three hundred eighty-nine".