728452569 has 16 divisors (see below), whose sum is σ = 1054226432. Its totient is φ = 444745728.

The previous prime is 728452547. The next prime is 728452583. The reversal of 728452569 is 965254827.

It is not a de Polignac number, because 728452569 - 2⁷ = 728452441 is a prime.

It is a super-2 number, since 2×728452569² = 1061286290565399522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (728452519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68584 + ... + 78489.

It is an arithmetic number, because the mean of its divisors is an integer number (65889152).

Almost surely, 2^728452569 is an apocalyptic number.

It is an amenable number.

728452569 is a deficient number, since it is larger than the sum of its proper divisors (325773863).

728452569 is a wasteful number, since it uses less digits than its factorization.

728452569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147216.

The product of its digits is 1209600, while the sum is 48.

The square root of 728452569 is about 26989.8604850044. The cubic root of 728452569 is about 899.7746633393.

The spelling of 728452569 in words is "seven hundred twenty-eight million, four hundred fifty-two thousand, five hundred sixty-nine".