78482489 has 4 divisors (see below), whose sum is σ = 83099124. Its totient is φ = 73865856.

The previous prime is 78482461. The next prime is 78482491. The reversal of 78482489 is 98428487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71149225 + 7333264 = 8435^2 + 2708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78482489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78482389) 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 3 ways as a sum of consecutive naturals, for example, 2308292 + ... + 2308325.

It is an arithmetic number, because the mean of its divisors is an integer number (20774781).

Almost surely, 2^78482489 is an apocalyptic number.

It is an amenable number.

78482489 is a deficient number, since it is larger than the sum of its proper divisors (4616635).

78482489 is a wasteful number, since it uses less digits than its factorization.

78482489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616634.

The product of its digits is 1032192, while the sum is 50.

The square root of 78482489 is about 8859.0343153190. The cubic root of 78482489 is about 428.1450453896.

The spelling of 78482489 in words is "seventy-eight million, four hundred eighty-two thousand, four hundred eighty-nine".