71528487 has 12 divisors (see below), whose sum is σ = 96562104. Its totient is φ = 47097520.

The previous prime is 71528467. The next prime is 71528491. The reversal of 71528487 is 78482517.

It is not a de Polignac number, because 71528487 - 2⁶ = 71528423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71528467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18937 + ... + 22397.

It is an arithmetic number, because the mean of its divisors is an integer number (8046842).

Almost surely, 2^71528487 is an apocalyptic number.

71528487 is a deficient number, since it is larger than the sum of its proper divisors (25033617).

71528487 is an equidigital number, since it uses as much as digits as its factorization.

71528487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630 (or 3547 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 71528487 is about 8457.4515665181. The cubic root of 71528487 is about 415.1066392621.

The spelling of 71528487 in words is "seventy-one million, five hundred twenty-eight thousand, four hundred eighty-seven".