78638234 has 8 divisors (see below), whose sum is σ = 119102880. Its totient is φ = 38937276.

The previous prime is 78638221. The next prime is 78638239. The reversal of 78638234 is 43283687.

78638234 is nontrivially palindromic in base 14.

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

It is a junction number, because it is equal to n+sod(n) for n = 78638191 and 78638200.

It is not an unprimeable number, because it can be changed into a prime (78638239) 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, 190664 + ... + 191075.

It is an arithmetic number, because the mean of its divisors is an integer number (14887860).

Almost surely, 2^78638234 is an apocalyptic number.

78638234 is a deficient number, since it is larger than the sum of its proper divisors (40464646).

78638234 is a wasteful number, since it uses less digits than its factorization.

78638234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381844.

The product of its digits is 193536, while the sum is 41.

The square root of 78638234 is about 8867.8201380046. The cubic root of 78638234 is about 428.4280698397.

The spelling of 78638234 in words is "seventy-eight million, six hundred thirty-eight thousand, two hundred thirty-four".