428171819 has 8 divisors (see below), whose sum is σ = 436165632. Its totient is φ = 420232680.

The previous prime is 428171693. The next prime is 428171827. The reversal of 428171819 is 918171824.

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 428171819 - 2⁸ = 428171563 is a prime.

It is a super-2 number, since 2×428171819² = 366662213171537522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428171879) 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 7 ways as a sum of consecutive naturals, for example, 2312 + ... + 29354.

It is an arithmetic number, because the mean of its divisors is an integer number (54520704).

Almost surely, 2^428171819 is an apocalyptic number.

428171819 is a deficient number, since it is larger than the sum of its proper divisors (7993813).

428171819 is a wasteful number, since it uses less digits than its factorization.

428171819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27337.

The product of its digits is 32256, while the sum is 41.

The square root of 428171819 is about 20692.3130413204. The cubic root of 428171819 is about 753.7130357817.

The spelling of 428171819 in words is "four hundred twenty-eight million, one hundred seventy-one thousand, eight hundred nineteen".