71550720 has 108 divisors (see below), whose sum is σ = 247597896. Its totient is φ = 19077120.

The previous prime is 71550691. The next prime is 71550727. The reversal of 71550720 is 2705517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71550727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8415 + ... + 14625.

Almost surely, 2^71550720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71550720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123798948).

71550720 is an abundant number, since it is smaller than the sum of its proper divisors (176047176).

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

71550720 is a wasteful number, since it uses less digits than its factorization.

71550720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6221 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 71550720 is about 8458.7658674301. The cubic root of 71550720 is about 415.1496436195.

The spelling of 71550720 in words is "seventy-one million, five hundred fifty thousand, seven hundred twenty".