71307030 has 32 divisors (see below), whose sum is σ = 171360000. Its totient is φ = 18990432.

The previous prime is 71307011. The next prime is 71307031. The reversal of 71307030 is 3070317.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71306988 and 71307006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71307031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41121 + ... + 42819.

It is an arithmetic number, because the mean of its divisors is an integer number (5355000).

Almost surely, 2^71307030 is an apocalyptic number.

71307030 is an abundant number, since it is smaller than the sum of its proper divisors (100052970).

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

71307030 is a wasteful number, since it uses less digits than its factorization.

71307030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 441, while the sum is 21.

The square root of 71307030 is about 8444.3489979986. The cubic root of 71307030 is about 414.6777970370.

Adding to 71307030 its reverse (3070317), we get a palindrome (74377347).

The spelling of 71307030 in words is "seventy-one million, three hundred seven thousand, thirty".