78523845 has 8 divisors (see below), whose sum is σ = 125638176. Its totient is φ = 41879376.

The previous prime is 78523843. The next prime is 78523847. The reversal of 78523845 is 54832587.

It is an interprime number because it is at equal distance from previous prime (78523843) and next prime (78523847).

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

It is not a de Polignac number, because 78523845 - 2¹ = 78523843 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78523797 and 78523806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78523843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2617447 + ... + 2617476.

It is an arithmetic number, because the mean of its divisors is an integer number (15704772).

Almost surely, 2^78523845 is an apocalyptic number.

It is an amenable number.

78523845 is a deficient number, since it is larger than the sum of its proper divisors (47114331).

78523845 is a wasteful number, since it uses less digits than its factorization.

78523845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5234931.

The product of its digits is 268800, while the sum is 42.

The square root of 78523845 is about 8861.3681223612. The cubic root of 78523845 is about 428.2202352293.

The spelling of 78523845 in words is "seventy-eight million, five hundred twenty-three thousand, eight hundred forty-five".