71903520 has 288 divisors, whose sum is σ = 277385472. Its totient is φ = 16828416.

The previous prime is 71903483. The next prime is 71903527. The reversal of 71903520 is 2530917.

It is a tau number, because it is divible by the number of its divisors (288).

It is not an unprimeable number, because it can be changed into a prime (71903527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 430477 + ... + 430643.

It is an arithmetic number, because the mean of its divisors is an integer number (963144).

Almost surely, 2^71903520 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 71903520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138692736).

71903520 is an abundant number, since it is smaller than the sum of its proper divisors (205481952).

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

71903520 is a wasteful number, since it uses less digits than its factorization.

71903520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 71903520 is about 8479.5943299193. The cubic root of 71903520 is about 415.8308607270.

The spelling of 71903520 in words is "seventy-one million, nine hundred three thousand, five hundred twenty".