71623520 has 48 divisors (see below), whose sum is σ = 170009280. Its totient is φ = 28514304.

The previous prime is 71623507. The next prime is 71623523. The reversal of 71623520 is 2532617.

It is a self number, because there is not a number n which added to its sum of digits gives 71623520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71623523) 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, 37304 + ... + 39176.

It is an arithmetic number, because the mean of its divisors is an integer number (3541860).

Almost surely, 2^71623520 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 71623520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85004640).

71623520 is an abundant number, since it is smaller than the sum of its proper divisors (98385760).

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

71623520 is a wasteful number, since it uses less digits than its factorization.

71623520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 71623520 is about 8463.0680016174. The cubic root of 71623520 is about 415.2903952879.

The spelling of 71623520 in words is "seventy-one million, six hundred twenty-three thousand, five hundred twenty".