78665234 has 8 divisors (see below), whose sum is σ = 119932428. Its totient is φ = 38687760.

The previous prime is 78665233. The next prime is 78665287. The reversal of 78665234 is 43256687.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48930025 + 29735209 = 6995^2 + 5453^2 .

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 = 78665191 and 78665200.

It is not an unprimeable number, because it can be changed into a prime (78665233) 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, 322277 + ... + 322520.

Almost surely, 2^78665234 is an apocalyptic number.

78665234 is a deficient number, since it is larger than the sum of its proper divisors (41267194).

78665234 is a wasteful number, since it uses less digits than its factorization.

78665234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644860.

The product of its digits is 241920, while the sum is 41.

The square root of 78665234 is about 8869.3423657000. The cubic root of 78665234 is about 428.4770970269.

The spelling of 78665234 in words is "seventy-eight million, six hundred sixty-five thousand, two hundred thirty-four".