78858319 has 4 divisors (see below), whose sum is σ = 79034400. Its totient is φ = 78682240.

The previous prime is 78858281. The next prime is 78858331. The reversal of 78858319 is 91385887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91385887 = 227 ⋅402581.

It is a cyclic number.

It is not a de Polignac number, because 78858319 - 2¹⁷ = 78727247 is a prime.

It is a super-2 number, since 2×78858319² = 12437268951011522, 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 (78858349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87367 + ... + 88264.

It is an arithmetic number, because the mean of its divisors is an integer number (19758600).

Almost surely, 2^78858319 is an apocalyptic number.

78858319 is a deficient number, since it is larger than the sum of its proper divisors (176081).

78858319 is a wasteful number, since it uses less digits than its factorization.

78858319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176080.

The product of its digits is 483840, while the sum is 49.

The square root of 78858319 is about 8880.2206616728. The cubic root of 78858319 is about 428.8273784190.

The spelling of 78858319 in words is "seventy-eight million, eight hundred fifty-eight thousand, three hundred nineteen".