78332881 has 8 divisors (see below), whose sum is σ = 86253984. Its totient is φ = 70545120.

The previous prime is 78332867. The next prime is 78332897. The reversal of 78332881 is 18823387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78332881 - 2¹³ = 78324689 is a prime.

It is a super-2 number, since 2×78332881² = 12272080491520322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78332851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32100 + ... + 34453.

It is an arithmetic number, because the mean of its divisors is an integer number (10781748).

Almost surely, 2^78332881 is an apocalyptic number.

It is an amenable number.

78332881 is a deficient number, since it is larger than the sum of its proper divisors (7921103).

78332881 is a wasteful number, since it uses less digits than its factorization.

78332881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66671.

The product of its digits is 64512, while the sum is 40.

The square root of 78332881 is about 8850.5864777426. The cubic root of 78332881 is about 427.8728204680.

The spelling of 78332881 in words is "seventy-eight million, three hundred thirty-two thousand, eight hundred eighty-one".