508231728 has 120 divisors (see below), whose sum is σ = 1558159200. Its totient is φ = 153925632.

The previous prime is 508231673. The next prime is 508231729. The reversal of 508231728 is 827132805.

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 = 508231692 and 508231701.

It is not an unprimeable number, because it can be changed into a prime (508231729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67413 + ... + 74571.

It is an arithmetic number, because the mean of its divisors is an integer number (12984660).

Almost surely, 2^508231728 is an apocalyptic number.

508231728 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 508231728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779079600).

508231728 is an abundant number, since it is smaller than the sum of its proper divisors (1049927472).

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

508231728 is a wasteful number, since it uses less digits than its factorization.

508231728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219 (or 7210 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 508231728 is about 22543.9953867987. The cubic root of 508231728 is about 798.0325235958.

The spelling of 508231728 in words is "five hundred eight million, two hundred thirty-one thousand, seven hundred twenty-eight".