231587328 has 240 divisors, whose sum is σ = 764107344. Its totient is φ = 61931520.

The previous prime is 231587287. The next prime is 231587339. The reversal of 231587328 is 823785132.

231587328 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

Its product of digits (80640) is a multiple of the sum of its prime divisors (210).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1279398 + ... + 1279578.

Almost surely, 2^231587328 is an apocalyptic number.

231587328 is a gapful number since it is divisible by the number (28) 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 231587328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382053672).

231587328 is an abundant number, since it is smaller than the sum of its proper divisors (532520016).

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

231587328 is a wasteful number, since it uses less digits than its factorization.

231587328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 210 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 231587328 is about 15217.9935602562. The cubic root of 231587328 is about 614.0988215707.

The spelling of 231587328 in words is "two hundred thirty-one million, five hundred eighty-seven thousand, three hundred twenty-eight".