78439496 has 32 divisors (see below), whose sum is σ = 156138840. Its totient is φ = 36814848.

The previous prime is 78439489. The next prime is 78439541. The reversal of 78439496 is 69493487.

It can be written as a sum of positive squares in 4 ways, for example, as 77968900 + 470596 = 8830^2 + 686^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91100 + ... + 91956.

Almost surely, 2^78439496 is an apocalyptic number.

It is an amenable number.

78439496 is a deficient number, since it is larger than the sum of its proper divisors (77699344).

78439496 is a wasteful number, since it uses less digits than its factorization.

78439496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1549 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 78439496 is about 8856.6074769067. The cubic root of 78439496 is about 428.0668512923.

The spelling of 78439496 in words is "seventy-eight million, four hundred thirty-nine thousand, four hundred ninety-six".