71838210 has 32 divisors (see below), whose sum is σ = 172798272. Its totient is φ = 19113920.

The previous prime is 71838197. The next prime is 71838211. The reversal of 71838210 is 1283817.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (71838211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12292 + ... + 17168.

It is an arithmetic number, because the mean of its divisors is an integer number (5399946).

Almost surely, 2^71838210 is an apocalyptic number.

71838210 is an abundant number, since it is smaller than the sum of its proper divisors (100960062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71838210 is a wasteful number, since it uses less digits than its factorization.

71838210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5378.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 71838210 is about 8475.7424453555. The cubic root of 71838210 is about 415.7049228027.

The spelling of 71838210 in words is "seventy-one million, eight hundred thirty-eight thousand, two hundred ten".