78338233 has 4 divisors (see below), whose sum is σ = 78517120. Its totient is φ = 78159348.

The previous prime is 78338203. The next prime is 78338243. The reversal of 78338233 is 33283387.

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 a cyclic number.

It is not a de Polignac number, because 78338233 - 2⁵ = 78338201 is a prime.

It is a super-2 number, since 2×78338233² = 12273757499124578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78338192 and 78338201.

It is not an unprimeable number, because it can be changed into a prime (78338203) 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, 88785 + ... + 89662.

It is an arithmetic number, because the mean of its divisors is an integer number (19629280).

Almost surely, 2^78338233 is an apocalyptic number.

It is an amenable number.

78338233 is a deficient number, since it is larger than the sum of its proper divisors (178887).

78338233 is a wasteful number, since it uses less digits than its factorization.

78338233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178886.

The product of its digits is 72576, while the sum is 37.

The square root of 78338233 is about 8850.8888254231. Note that the first 4 decimals coincide. The cubic root of 78338233 is about 427.8825648782.

The spelling of 78338233 in words is "seventy-eight million, three hundred thirty-eight thousand, two hundred thirty-three".