71620230 has 64 divisors (see below), whose sum is σ = 193591296. Its totient is φ = 16800000.

The previous prime is 71620207. The next prime is 71620231. The reversal of 71620230 is 3202617.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 71620197 and 71620206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71620231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6730 + ... + 13730.

It is an arithmetic number, because the mean of its divisors is an integer number (3024864).

Almost surely, 2^71620230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71620230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96795648).

71620230 is an abundant number, since it is smaller than the sum of its proper divisors (121971066).

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

71620230 is a wasteful number, since it uses less digits than its factorization.

71620230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7053.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 71620230 is about 8462.8736254301. The cubic root of 71620230 is about 415.2840364534.

Adding to 71620230 its reverse (3202617), we get a palindrome (74822847).

The spelling of 71620230 in words is "seventy-one million, six hundred twenty thousand, two hundred thirty".