231146328 has 128 divisors (see below), whose sum is σ = 690624000. Its totient is φ = 64407168.

The previous prime is 231146309. The next prime is 231146341. The reversal of 231146328 is 823641132.

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 = 231146295 and 231146304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353650 + ... + 354302.

It is an arithmetic number, because the mean of its divisors is an integer number (5395500).

Almost surely, 2^231146328 is an apocalyptic number.

231146328 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 231146328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345312000).

231146328 is an abundant number, since it is smaller than the sum of its proper divisors (459477672).

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

231146328 is a wasteful number, since it uses less digits than its factorization.

231146328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 708 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 231146328 is about 15203.4972292562. The cubic root of 231146328 is about 613.7087748064.

The spelling of 231146328 in words is "two hundred thirty-one million, one hundred forty-six thousand, three hundred twenty-eight".