78468915 has 16 divisors (see below), whose sum is σ = 143486208. Its totient is φ = 35871456.

The previous prime is 78468899. The next prime is 78468931. The reversal of 78468915 is 51986487.

It is an interprime number because it is at equal distance from previous prime (78468899) and next prime (78468931).

It is not a de Polignac number, because 78468915 - 2⁴ = 78468899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373557 + ... + 373766.

It is an arithmetic number, because the mean of its divisors is an integer number (8967888).

Almost surely, 2^78468915 is an apocalyptic number.

78468915 is a deficient number, since it is larger than the sum of its proper divisors (65017293).

78468915 is a wasteful number, since it uses less digits than its factorization.

78468915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747338.

The product of its digits is 483840, while the sum is 48.

The square root of 78468915 is about 8858.2681716010. The cubic root of 78468915 is about 428.1203605798.

It can be divided in two parts, 7846 and 8915, that added together give a palindrome (16761).

The spelling of 78468915 in words is "seventy-eight million, four hundred sixty-eight thousand, nine hundred fifteen".