428156271 has 48 divisors (see below), whose sum is σ = 670213440. Its totient is φ = 262425600.

The previous prime is 428156233. The next prime is 428156273. The reversal of 428156271 is 172651824.

428156271 is a `hidden beast` number, since 4 + 28 + 1 + 5 + 627 + 1 = 666.

It is not a de Polignac number, because 428156271 - 2¹⁹ = 427631983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428156273) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1591525 + ... + 1591793.

It is an arithmetic number, because the mean of its divisors is an integer number (13962780).

Almost surely, 2^428156271 is an apocalyptic number.

428156271 is a deficient number, since it is larger than the sum of its proper divisors (242057169).

428156271 is a wasteful number, since it uses less digits than its factorization.

428156271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 493 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 428156271 is about 20691.9373428396. The cubic root of 428156271 is about 753.7039125967.

The spelling of 428156271 in words is "four hundred twenty-eight million, one hundred fifty-six thousand, two hundred seventy-one".