78463815 has 8 divisors (see below), whose sum is σ = 125542128. Its totient is φ = 41847360.

The previous prime is 78463813. The next prime is 78463817. The reversal of 78463815 is 51836487.

It is an interprime number because it is at equal distance from previous prime (78463813) and next prime (78463817).

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

It is not a de Polignac number, because 78463815 - 2¹ = 78463813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78463811) 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 7 ways as a sum of consecutive naturals, for example, 2615446 + ... + 2615475.

It is an arithmetic number, because the mean of its divisors is an integer number (15692766).

Almost surely, 2^78463815 is an apocalyptic number.

78463815 is a deficient number, since it is larger than the sum of its proper divisors (47078313).

78463815 is a wasteful number, since it uses less digits than its factorization.

78463815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5230929.

The product of its digits is 161280, while the sum is 42.

The square root of 78463815 is about 8857.9803002716. The cubic root of 78463815 is about 428.1110853097. Note that the first 3 decimals are identical.

The spelling of 78463815 in words is "seventy-eight million, four hundred sixty-three thousand, eight hundred fifteen".