78230839 has 4 divisors (see below), whose sum is σ = 80345224. Its totient is φ = 76116456.

The previous prime is 78230837. The next prime is 78230879. The reversal of 78230839 is 93803287.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93803287 = 1181 ⋅79427.

It is a cyclic number.

It is not a de Polignac number, because 78230839 - 2¹ = 78230837 is a prime.

It is a super-3 number, since 3×78230839³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78230833) 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, 1057137 + ... + 1057210.

It is an arithmetic number, because the mean of its divisors is an integer number (20086306).

Almost surely, 2^78230839 is an apocalyptic number.

78230839 is a deficient number, since it is larger than the sum of its proper divisors (2114385).

78230839 is a wasteful number, since it uses less digits than its factorization.

78230839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114384.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 78230839 is about 8844.8198964139. The cubic root of 78230839 is about 427.6869471788.

The spelling of 78230839 in words is "seventy-eight million, two hundred thirty thousand, eight hundred thirty-nine".