231726528 has 224 divisors, whose sum is σ = 757854720. Its totient is φ = 68843520.

The previous prime is 231726461. The next prime is 231726533. The reversal of 231726528 is 825627132.

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

It is a junction number, because it is equal to n+sod(n) for n = 231726492 and 231726501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1387501 + ... + 1387667.

It is an arithmetic number, because the mean of its divisors is an integer number (3383280).

Almost surely, 2^231726528 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 231726528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378927360).

231726528 is an abundant number, since it is smaller than the sum of its proper divisors (526128192).

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

231726528 is a wasteful number, since it uses less digits than its factorization.

231726528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 256 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 231726528 is about 15222.5664064901. The cubic root of 231726528 is about 614.2218355477.

The spelling of 231726528 in words is "two hundred thirty-one million, seven hundred twenty-six thousand, five hundred twenty-eight".