78332578 has 16 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 38422576.

The previous prime is 78332563. The next prime is 78332669. The reversal of 78332578 is 87523387.

It is a super-2 number, since 2×78332578² = 12271985552252168, 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 7 ways as a sum of consecutive naturals, for example, 23151 + ... + 26317.

It is an arithmetic number, because the mean of its divisors is an integer number (7484400).

Almost surely, 2^78332578 is an apocalyptic number.

78332578 is a deficient number, since it is larger than the sum of its proper divisors (41417822).

78332578 is a wasteful number, since it uses less digits than its factorization.

78332578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401.

The product of its digits is 282240, while the sum is 43.

The square root of 78332578 is about 8850.5693602163. The cubic root of 78332578 is about 427.8722687813.

The spelling of 78332578 in words is "seventy-eight million, three hundred thirty-two thousand, five hundred seventy-eight".