428172371 has 8 divisors (see below), whose sum is σ = 477960384. Its totient is φ = 380194920.

The previous prime is 428172343. The next prime is 428172379. The reversal of 428172371 is 173271824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428172371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428172379) 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, 452141 + ... + 453086.

It is an arithmetic number, because the mean of its divisors is an integer number (59745048).

Almost surely, 2^428172371 is an apocalyptic number.

428172371 is a deficient number, since it is larger than the sum of its proper divisors (49788013).

428172371 is a wasteful number, since it uses less digits than its factorization.

428172371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905281.

The product of its digits is 18816, while the sum is 35.

The square root of 428172371 is about 20692.3263796027. The cubic root of 428172371 is about 753.7133596777.

The spelling of 428172371 in words is "four hundred twenty-eight million, one hundred seventy-two thousand, three hundred seventy-one".