71828489 has 6 divisors (see below), whose sum is σ = 72921114. Its totient is φ = 70752000.

The previous prime is 71828467. The next prime is 71828501. The reversal of 71828489 is 98482817.

It can be written as a sum of positive squares in only one way, i.e., 69022864 + 2805625 = 8308^2 + 1675^2 .

It is not a de Polignac number, because 71828489 - 2⁸ = 71828233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71827489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3512 + ... + 12489.

It is an arithmetic number, because the mean of its divisors is an integer number (12153519).

Almost surely, 2^71828489 is an apocalyptic number.

It is an amenable number.

71828489 is a deficient number, since it is larger than the sum of its proper divisors (1092625).

71828489 is an equidigital number, since it uses as much as digits as its factorization.

71828489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16135 (or 16068 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 71828489 is about 8475.1689658673. The cubic root of 71828489 is about 415.6861711762.

The spelling of 71828489 in words is "seventy-one million, eight hundred twenty-eight thousand, four hundred eighty-nine".