71233720 has 32 divisors (see below), whose sum is σ = 160665120. Its totient is φ = 28424320.

The previous prime is 71233703. The next prime is 71233727. The reversal of 71233720 is 2733217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71233727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16509 + ... + 20371.

It is an arithmetic number, because the mean of its divisors is an integer number (5020785).

Almost surely, 2^71233720 is an apocalyptic number.

It is an amenable number.

71233720 is an abundant number, since it is smaller than the sum of its proper divisors (89431400).

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

71233720 is a wasteful number, since it uses less digits than its factorization.

71233720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335 (or 4331 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 71233720 is about 8440.0071090017. The cubic root of 71233720 is about 414.5356396965.

Adding to 71233720 its reverse (2733217), we get a palindrome (73966937).

The spelling of 71233720 in words is "seventy-one million, two hundred thirty-three thousand, seven hundred twenty".