78647908 has 12 divisors (see below), whose sum is σ = 137767420. Its totient is φ = 39285792.

The previous prime is 78647893. The next prime is 78647909. The reversal of 78647908 is 80974687.

It can be written as a sum of positive squares in 2 ways, for example, as 71368704 + 7279204 = 8448^2 + 2698^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78647909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4623 + ... + 13366.

Almost surely, 2^78647908 is an apocalyptic number.

It is an amenable number.

78647908 is a deficient number, since it is larger than the sum of its proper divisors (59119512).

78647908 is a wasteful number, since it uses less digits than its factorization.

78647908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19086 (or 19084 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 78647908 is about 8868.3655765874. The cubic root of 78647908 is about 428.4456373892.

The spelling of 78647908 in words is "seventy-eight million, six hundred forty-seven thousand, nine hundred eight".