78889233 has 4 divisors (see below), whose sum is σ = 105185648. Its totient is φ = 52592820.

The previous prime is 78889199. The next prime is 78889243. The reversal of 78889233 is 33298887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78889233 - 2¹² = 78885137 is a prime.

It is a super-2 number, since 2×78889233² = 12447022166656578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78889243) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13148203 + ... + 13148208.

It is an arithmetic number, because the mean of its divisors is an integer number (26296412).

Almost surely, 2^78889233 is an apocalyptic number.

It is an amenable number.

78889233 is a deficient number, since it is larger than the sum of its proper divisors (26296415).

78889233 is a wasteful number, since it uses less digits than its factorization.

78889233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26296414.

The product of its digits is 580608, while the sum is 48.

The square root of 78889233 is about 8881.9611010182. The cubic root of 78889233 is about 428.8834073319.

The spelling of 78889233 in words is "seventy-eight million, eight hundred eighty-nine thousand, two hundred thirty-three".