78913578 has 32 divisors (see below), whose sum is σ = 160699392. Its totient is φ = 25830000.

The previous prime is 78913577. The next prime is 78913591. The reversal of 78913578 is 87531987.

It is not an unprimeable number, because it can be changed into a prime (78913573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104703 + ... + 105453.

It is an arithmetic number, because the mean of its divisors is an integer number (5021856).

Almost surely, 2^78913578 is an apocalyptic number.

78913578 is an abundant number, since it is smaller than the sum of its proper divisors (81785814).

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

78913578 is a wasteful number, since it uses less digits than its factorization.

78913578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050.

The product of its digits is 423360, while the sum is 48.

The square root of 78913578 is about 8883.3314696683. The cubic root of 78913578 is about 428.9275202072.

The spelling of 78913578 in words is "seventy-eight million, nine hundred thirteen thousand, five hundred seventy-eight".