78908320 has 24 divisors (see below), whose sum is σ = 186421284. Its totient is φ = 31563264.

The previous prime is 78908287. The next prime is 78908329. The reversal of 78908320 is 2380987.

It can be written as a sum of positive squares in 2 ways, for example, as 70358544 + 8549776 = 8388^2 + 2924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78908320.

It is not an unprimeable number, because it can be changed into a prime (78908329) 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, 246429 + ... + 246748.

Almost surely, 2^78908320 is an apocalyptic number.

It is an amenable number.

78908320 is an abundant number, since it is smaller than the sum of its proper divisors (107512964).

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

78908320 is a wasteful number, since it uses less digits than its factorization.

78908320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493192 (or 493184 counting only the distinct ones).

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

The square root of 78908320 is about 8883.0355172092. The cubic root of 78908320 is about 428.9179935366.

The spelling of 78908320 in words is "seventy-eight million, nine hundred eight thousand, three hundred twenty".