71808238 has 8 divisors (see below), whose sum is σ = 114048432. Its totient is φ = 33792096.

The previous prime is 71808211. The next prime is 71808283. The reversal of 71808238 is 83280817.

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 = 71808197 and 71808206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055970 + ... + 1056037.

It is an arithmetic number, because the mean of its divisors is an integer number (14256054).

Almost surely, 2^71808238 is an apocalyptic number.

71808238 is a deficient number, since it is larger than the sum of its proper divisors (42240194).

71808238 is a wasteful number, since it uses less digits than its factorization.

71808238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112026.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 71808238 is about 8473.9741562032. The cubic root of 71808238 is about 415.6471019433.

The spelling of 71808238 in words is "seventy-one million, eight hundred eight thousand, two hundred thirty-eight".