78000238 has 4 divisors (see below), whose sum is σ = 117000360. Its totient is φ = 39000118.

The previous prime is 78000229. The next prime is 78000257. The reversal of 78000238 is 83200087.

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: 83200087 = 37 ⋅2248651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19500058 + ... + 19500061.

It is an arithmetic number, because the mean of its divisors is an integer number (29250090).

Almost surely, 2^78000238 is an apocalyptic number.

78000238 is a deficient number, since it is larger than the sum of its proper divisors (39000122).

78000238 is a wasteful number, since it uses less digits than its factorization.

78000238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39000121.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 78000238 is about 8831.7743404143. The cubic root of 78000238 is about 427.2663027389.

The spelling of 78000238 in words is "seventy-eight million, two hundred thirty-eight", and thus it is an aban number.