78858323 has 4 divisors (see below), whose sum is σ = 79938648. Its totient is φ = 77778000.

The previous prime is 78858281. The next prime is 78858331. The reversal of 78858323 is 32385887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32385887 = 1213 ⋅26699.

It is a cyclic number.

It is not a de Polignac number, because 78858323 - 2²⁶ = 11749459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78818323) 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, 540053 + ... + 540198.

It is an arithmetic number, because the mean of its divisors is an integer number (19984662).

Almost surely, 2^78858323 is an apocalyptic number.

78858323 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

78858323 is a deficient number, since it is larger than the sum of its proper divisors (1080325).

78858323 is a wasteful number, since it uses less digits than its factorization.

78858323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080324.

The product of its digits is 322560, while the sum is 44.

The square root of 78858323 is about 8880.2208868924. The cubic root of 78858323 is about 428.8273856696.

The spelling of 78858323 in words is "seventy-eight million, eight hundred fifty-eight thousand, three hundred twenty-three".