231428 has 12 divisors (see below), whose sum is σ = 413952. Its totient is φ = 113160.

The previous prime is 231419. The next prime is 231431. The reversal of 231428 is 824132.

231428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

231428 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2¹¹ + 3 + 4⁸ + 1 + 2¹⁷ + 8⁵ .

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231428.

It is an unprimeable number.

231428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (34496).

2²³¹⁴²⁸ is an apocalyptic number.

It is an amenable number.

231428 is a deficient number, since it is larger than the sum of its proper divisors (182524).

231428 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 231428 = (382412)₉.

231428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1280 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 231428 is about 481.0696415281. The cubic root of 231428 is about 61.3957959540.

Subtracting 231428 from its reverse (824132), we obtain a cube (592704 = 84³).

It can be divided in two parts, 23142 and 8, that multiplied together give a triangular number (185136 = T₆₀₈).

The spelling of 231428 in words is "two hundred thirty-one thousand, four hundred twenty-eight".