428166231 has 8 divisors (see below), whose sum is σ = 571553280. Its totient is φ = 285111672.

The previous prime is 428166217. The next prime is 428166253. The reversal of 428166231 is 132661824.

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

It is not a de Polignac number, because 428166231 - 2⁷ = 428166103 is a prime.

It is a super-2 number, since 2×428166231² = 366652642737490722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 428166192 and 428166201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428166931) 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, 80101 + ... + 85278.

It is an arithmetic number, because the mean of its divisors is an integer number (71444160).

Almost surely, 2^428166231 is an apocalyptic number.

428166231 is a deficient number, since it is larger than the sum of its proper divisors (143387049).

428166231 is a wasteful number, since it uses less digits than its factorization.

428166231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166245.

The product of its digits is 13824, while the sum is 33.

The square root of 428166231 is about 20692.1780148925. The cubic root of 428166231 is about 753.7097569058.

The spelling of 428166231 in words is "four hundred twenty-eight million, one hundred sixty-six thousand, two hundred thirty-one".