78239008 has 24 divisors (see below), whose sum is σ = 160731648. Its totient is φ = 37418304.

The previous prime is 78238997. The next prime is 78239023. The reversal of 78239008 is 80093287.

It is a super-2 number, since 2×78239008² = 12242684745648128, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 52416 + ... + 53887.

It is an arithmetic number, because the mean of its divisors is an integer number (6697152).

Almost surely, 2^78239008 is an apocalyptic number.

It is an amenable number.

78239008 is an abundant number, since it is smaller than the sum of its proper divisors (82492640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78239008 is a wasteful number, since it uses less digits than its factorization.

78239008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106336 (or 106328 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 78239008 is about 8845.2816800823. The cubic root of 78239008 is about 427.7018332652.

It can be divided in two parts, 78 and 239008, that added together give a triangular number (239086 = T₆₉₁).

The spelling of 78239008 in words is "seventy-eight million, two hundred thirty-nine thousand, eight".