428508231 has 8 divisors (see below), whose sum is σ = 571676160. Its totient is φ = 285506232.

The previous prime is 428508229. The next prime is 428508251. The reversal of 428508231 is 132805824.

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

It is not a de Polignac number, because 428508231 - 2¹ = 428508229 is a prime.

It is a super-2 number, since 2×428508231² = 367238608069498722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 428508192 and 428508201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428508221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35325 + ... + 45878.

It is an arithmetic number, because the mean of its divisors is an integer number (71459520).

Almost surely, 2^428508231 is an apocalyptic number.

428508231 is a deficient number, since it is larger than the sum of its proper divisors (143167929).

428508231 is a wasteful number, since it uses less digits than its factorization.

428508231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82965.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 428508231 is about 20700.4403576349. The cubic root of 428508231 is about 753.9103800262.

The spelling of 428508231 in words is "four hundred twenty-eight million, five hundred eight thousand, two hundred thirty-one".