78742208 has 14 divisors (see below), whose sum is σ = 156254196. Its totient is φ = 39371072.

The previous prime is 78742207. The next prime is 78742211. The reversal of 78742208 is 80224787.

It is not an unprimeable number, because it can be changed into a prime (78742207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615110 + ... + 615237.

It is an arithmetic number, because the mean of its divisors is an integer number (11161014).

Almost surely, 2^78742208 is an apocalyptic number.

It is an amenable number.

78742208 is a deficient number, since it is larger than the sum of its proper divisors (77511988).

78742208 is a wasteful number, since it uses less digits than its factorization.

78742208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230359 (or 1230349 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 78742208 is about 8873.6806343253. The cubic root of 78742208 is about 428.6168065390.

The spelling of 78742208 in words is "seventy-eight million, seven hundred forty-two thousand, two hundred eight".