74528689 has 9 divisors (see below), whose sum is σ = 76160577. Its totient is φ = 72931584.

The previous prime is 74528683. The next prime is 74528711. The reversal of 74528689 is 98682547.

The square root of 74528689 is 8633.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10400625 + 64128064 = 3225^2 + 8008^2 .

It is not a de Polignac number, because 74528689 - 2⁹ = 74528177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74528683) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 768289 + ... + 768385.

Almost surely, 2^74528689 is an apocalyptic number.

74528689 is the 8633-rd square number.

74528689 is the 4317-th centered octagonal number.

It is an amenable number.

74528689 is a deficient number, since it is larger than the sum of its proper divisors (1631888).

74528689 is an frugal number, since it uses more digits than its factorization.

74528689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 186 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The cubic root of 74528689 is about 420.8310999805.

Multiplying 74528689 by its sum of digits (49), we get a square (3651905761 = 60431²).

The spelling of 74528689 in words is "seventy-four million, five hundred twenty-eight thousand, six hundred eighty-nine".