78018034 has 4 divisors (see below), whose sum is σ = 117027054. Its totient is φ = 39009016.

The previous prime is 78018029. The next prime is 78018037. The reversal of 78018034 is 43081087.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43081087 = 7 ⋅6154441.

It can be written as a sum of positive squares in only one way, i.e., 75777025 + 2241009 = 8705^2 + 1497^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 78017987 and 78018005.

It is not an unprimeable number, because it can be changed into a prime (78018037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19504507 + ... + 19504510.

Almost surely, 2^78018034 is an apocalyptic number.

78018034 is a deficient number, since it is larger than the sum of its proper divisors (39009020).

78018034 is a wasteful number, since it uses less digits than its factorization.

78018034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39009019.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 78018034 is about 8832.7817815227. The cubic root of 78018034 is about 427.2987943190.

The spelling of 78018034 in words is "seventy-eight million, eighteen thousand, thirty-four".