428351669 has 8 divisors (see below), whose sum is σ = 454047768. Its totient is φ = 402711040.

The previous prime is 428351659. The next prime is 428351687. The reversal of 428351669 is 966153824.

It can be written as a sum of positive squares in 4 ways, for example, as 66210769 + 362140900 = 8137^2 + 19030^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428351669 - 2⁴ = 428351653 is a prime.

It is a super-2 number, since 2×428351669² = 366970304670171122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428351659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2609 + ... + 29385.

It is an arithmetic number, because the mean of its divisors is an integer number (56755971).

Almost surely, 2^428351669 is an apocalyptic number.

It is an amenable number.

428351669 is a deficient number, since it is larger than the sum of its proper divisors (25696099).

428351669 is a wasteful number, since it uses less digits than its factorization.

428351669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27735.

The product of its digits is 311040, while the sum is 44.

The square root of 428351669 is about 20696.6584017807. The cubic root of 428351669 is about 753.8185513001.

The spelling of 428351669 in words is "four hundred twenty-eight million, three hundred fifty-one thousand, six hundred sixty-nine".