428724569 has 24 divisors (see below), whose sum is σ = 565367040. Its totient is φ = 321348384.

The previous prime is 428724559. The next prime is 428724589. The reversal of 428724569 is 965427824.

It is not a de Polignac number, because 428724569 - 2²⁰ = 427675993 is a prime.

It is a super-2 number, since 2×428724569² = 367609512128471522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428724539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5609 + ... + 29814.

It is an arithmetic number, because the mean of its divisors is an integer number (23556960).

Almost surely, 2^428724569 is an apocalyptic number.

428724569 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

428724569 is a deficient number, since it is larger than the sum of its proper divisors (136642471).

428724569 is a wasteful number, since it uses less digits than its factorization.

428724569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35469 (or 35462 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 428724569 is about 20705.6651426608. The cubic root of 428724569 is about 754.0372325283.

The spelling of 428724569 in words is "four hundred twenty-eight million, seven hundred twenty-four thousand, five hundred sixty-nine".