78423854 has 8 divisors (see below), whose sum is σ = 117703368. Its totient is φ = 39189400.

The previous prime is 78423833. The next prime is 78423883. The reversal of 78423854 is 45832487.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6512 + ... + 14115.

It is an arithmetic number, because the mean of its divisors is an integer number (14712921).

Almost surely, 2^78423854 is an apocalyptic number.

78423854 is a deficient number, since it is larger than the sum of its proper divisors (39279514).

78423854 is a wasteful number, since it uses less digits than its factorization.

78423854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22530.

The product of its digits is 215040, while the sum is 41.

The square root of 78423854 is about 8855.7243633708. The cubic root of 78423854 is about 428.0383951056.

The spelling of 78423854 in words is "seventy-eight million, four hundred twenty-three thousand, eight hundred fifty-four".