231469128 has 108 divisors (see below), whose sum is σ = 693320355. Its totient is φ = 69711840.

The previous prime is 231469123. The next prime is 231469169. The reversal of 231469128 is 821964132.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

231469128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 115734564 + 115734564 = 10758^2 + 10758^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10758.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 231469092 and 231469101.

It is not an unprimeable number, because it can be changed into a prime (231469123) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1419975 + ... + 1420137.

Almost surely, 2^231469128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231469128

231469128 is an abundant number, since it is smaller than the sum of its proper divisors (461851227).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231469128 is a wasteful number, since it uses less digits than its factorization.

231469128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 179 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 231469128 is about 15214.1095040098. The cubic root of 231469128 is about 613.9943270315.

The spelling of 231469128 in words is "two hundred thirty-one million, four hundred sixty-nine thousand, one hundred twenty-eight".