78478082 has 4 divisors (see below), whose sum is σ = 117717126. Its totient is φ = 39239040.

The previous prime is 78478079. The next prime is 78478097. The reversal of 78478082 is 28087487.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 66080641 + 12397441 = 8129^2 + 3521^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 19619519 + ... + 19619522.

Almost surely, 2^78478082 is an apocalyptic number.

78478082 is a deficient number, since it is larger than the sum of its proper divisors (39239044).

78478082 is a wasteful number, since it uses less digits than its factorization.

78478082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39239043.

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 78478082 is about 8858.7855826857. The cubic root of 78478082 is about 428.1370314128.

The spelling of 78478082 in words is "seventy-eight million, four hundred seventy-eight thousand, eighty-two".