428306969 has 4 divisors (see below), whose sum is σ = 428491044. Its totient is φ = 428122896.

The previous prime is 428306929. The next prime is 428306971. The reversal of 428306969 is 969603824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59474944 + 368832025 = 7712^2 + 19205^2 .

It is a cyclic number.

It is not a de Polignac number, because 428306969 - 2²⁴ = 411529753 is a prime.

It is a super-2 number, since 2×428306969² = 366893719387933922, 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 (428306909) 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, 88502 + ... + 93215.

It is an arithmetic number, because the mean of its divisors is an integer number (107122761).

Almost surely, 2^428306969 is an apocalyptic number.

It is an amenable number.

428306969 is a deficient number, since it is larger than the sum of its proper divisors (184075).

428306969 is a wasteful number, since it uses less digits than its factorization.

428306969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184074.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 428306969 is about 20695.5784891363. The cubic root of 428306969 is about 753.7923291841.

The spelling of 428306969 in words is "four hundred twenty-eight million, three hundred six thousand, nine hundred sixty-nine".