71993500 has 48 divisors (see below), whose sum is σ = 158532192. Its totient is φ = 28560000.

The previous prime is 71993491. The next prime is 71993513. The reversal of 71993500 is 539917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67975 + ... + 69025.

It is an arithmetic number, because the mean of its divisors is an integer number (3302754).

Almost surely, 2^71993500 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 71993500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79266096).

71993500 is an abundant number, since it is smaller than the sum of its proper divisors (86538692).

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

71993500 is a wasteful number, since it uses less digits than its factorization.

71993500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 71993500 is about 8484.8983494206. The cubic root of 71993500 is about 416.0042452106.

The spelling of 71993500 in words is "seventy-one million, nine hundred ninety-three thousand, five hundred".