4528391 has 4 divisors (see below), whose sum is σ = 5175312. Its totient is φ = 3881472.

The previous prime is 4528369. The next prime is 4528399. The reversal of 4528391 is 1938254.

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

It is not a de Polignac number, because 4528391 - 2¹⁴ = 4512007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4528399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323450 + ... + 323463.

It is an arithmetic number, because the mean of its divisors is an integer number (1293828).

Almost surely, 2^4528391 is an apocalyptic number.

4528391 is a deficient number, since it is larger than the sum of its proper divisors (646921).

4528391 is an equidigital number, since it uses as much as digits as its factorization.

4528391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646920.

The product of its digits is 8640, while the sum is 32.

The square root of 4528391 is about 2128.0016447362. The cubic root of 4528391 is about 165.4428385759.

The spelling of 4528391 in words is "four million, five hundred twenty-eight thousand, three hundred ninety-one".