78485547 has 32 divisors (see below), whose sum is σ = 124411392. Its totient is φ = 43075584.

The previous prime is 78485543. The next prime is 78485551. The reversal of 78485547 is 74558487.

It is an interprime number because it is at equal distance from previous prime (78485543) and next prime (78485551).

It is not a de Polignac number, because 78485547 - 2² = 78485543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78485496 and 78485505.

It is not an unprimeable number, because it can be changed into a prime (78485543) 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 31 ways as a sum of consecutive naturals, for example, 63883 + ... + 65099.

It is an arithmetic number, because the mean of its divisors is an integer number (3887856).

Almost surely, 2^78485547 is an apocalyptic number.

78485547 is a deficient number, since it is larger than the sum of its proper divisors (45925845).

78485547 is a wasteful number, since it uses less digits than its factorization.

78485547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347.

The product of its digits is 1254400, while the sum is 48.

The square root of 78485547 is about 8859.2069058127. The cubic root of 78485547 is about 428.1506060803.

The spelling of 78485547 in words is "seventy-eight million, four hundred eighty-five thousand, five hundred forty-seven".