71528 has 8 divisors (see below), whose sum is σ = 134130. Its totient is φ = 35760.

The previous prime is 71527. The next prime is 71537. The reversal of 71528 is 82517.

It can be written as a sum of positive squares in only one way, i.e., 56644 + 14884 = 238^2 + 122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (71527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4463 + ... + 4478.

2⁷¹⁵²⁸ is an apocalyptic number.

It is an amenable number.

71528 is a deficient number, since it is larger than the sum of its proper divisors (62602).

71528 is a wasteful number, since it uses less digits than its factorization.

71528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8947 (or 8943 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 71528 is about 267.4471910490. The cubic root of 71528 is about 41.5105697179.

The spelling of 71528 in words is "seventy-one thousand, five hundred twenty-eight".