231789540 has 48 divisors (see below), whose sum is σ = 650744640. Its totient is φ = 61645440.

The previous prime is 231789529. The next prime is 231789541. The reversal of 231789540 is 45987132.

It is not an unprimeable number, because it can be changed into a prime (231789541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18375 + ... + 28305.

It is an arithmetic number, because the mean of its divisors is an integer number (13557180).

Almost surely, 2^231789540 is an apocalyptic number.

231789540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231789540 is an abundant number, since it is smaller than the sum of its proper divisors (418955100).

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

231789540 is a wasteful number, since it uses less digits than its factorization.

231789540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332 (or 10330 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 231789540 is about 15224.6359562388. The cubic root of 231789540 is about 614.2775043843.

The spelling of 231789540 in words is "two hundred thirty-one million, seven hundred eighty-nine thousand, five hundred forty".