78457682 has 8 divisors (see below), whose sum is σ = 120557052. Its totient is φ = 38272000.

The previous prime is 78457681. The next prime is 78457693. The reversal of 78457682 is 28675487.

It can be written as a sum of positive squares in 2 ways, for example, as 78304801 + 152881 = 8849^2 + 391^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78457681) 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, 478319 + ... + 478482.

Almost surely, 2^78457682 is an apocalyptic number.

78457682 is a deficient number, since it is larger than the sum of its proper divisors (42099370).

78457682 is a wasteful number, since it uses less digits than its factorization.

78457682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956844.

The product of its digits is 752640, while the sum is 47.

The square root of 78457682 is about 8857.6341084965. The cubic root of 78457682 is about 428.0999308105.

The spelling of 78457682 in words is "seventy-eight million, four hundred fifty-seven thousand, six hundred eighty-two".