428166469 has 4 divisors (see below), whose sum is σ = 442930860. Its totient is φ = 413402080.

The previous prime is 428166433. The next prime is 428166509. The reversal of 428166469 is 964661824.

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 98743969 + 329422500 = 9937^2 + 18150^2 .

It is a cyclic number.

It is not a de Polignac number, because 428166469 - 2⁷ = 428166341 is a prime.

It is a super-2 number, since 2×428166469² = 366653050351855922, 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 (428166269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7382152 + ... + 7382209.

It is an arithmetic number, because the mean of its divisors is an integer number (110732715).

Almost surely, 2^428166469 is an apocalyptic number.

It is an amenable number.

428166469 is a deficient number, since it is larger than the sum of its proper divisors (14764391).

428166469 is a wasteful number, since it uses less digits than its factorization.

428166469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14764390.

The product of its digits is 497664, while the sum is 46.

The square root of 428166469 is about 20692.1837658571. The cubic root of 428166469 is about 753.7098965579.

The spelling of 428166469 in words is "four hundred twenty-eight million, one hundred sixty-six thousand, four hundred sixty-nine".