78485418 has 48 divisors (see below), whose sum is σ = 186170400. Its totient is φ = 23699040.

The previous prime is 78485417. The next prime is 78485419. The reversal of 78485418 is 81458487.

It is an interprime number because it is at equal distance from previous prime (78485417) and next prime (78485419).

It is not an unprimeable number, because it can be changed into a prime (78485417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76513 + ... + 77531.

It is an arithmetic number, because the mean of its divisors is an integer number (3878550).

Almost surely, 2^78485418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78485418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93085200).

78485418 is an abundant number, since it is smaller than the sum of its proper divisors (107684982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78485418 is a wasteful number, since it uses less digits than its factorization.

78485418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1424 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 78485418 is about 8859.1996252483. The cubic root of 78485418 is about 428.1503715086.

The spelling of 78485418 in words is "seventy-eight million, four hundred eighty-five thousand, four hundred eighteen".