528415 has 4 divisors (see below), whose sum is σ = 634104. Its totient is φ = 422728.

The previous prime is 528413. The next prime is 528419. The reversal of 528415 is 514825.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 528415 - 2¹ = 528413 is a prime.

It is a d-powerful number, because it can be written as 5 + 2¹⁸ + 4⁹ + 8⁴ + 1 + 5² .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 528415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52837 + ... + 52846.

It is an arithmetic number, because the mean of its divisors is an integer number (158526).

2⁵²⁸⁴¹⁵ is an apocalyptic number.

528415 is a deficient number, since it is larger than the sum of its proper divisors (105689).

528415 is a wasteful number, since it uses less digits than its factorization.

528415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105688.

The product of its digits is 1600, while the sum is 25.

The square root of 528415 is about 726.9215913701. The cubic root of 528415 is about 80.8459705564.

It can be divided in two parts, 52 and 8415, that multiplied together give a triangular number (437580 = T₉₃₅).

The spelling of 528415 in words is "five hundred twenty-eight thousand, four hundred fifteen".