231498440 has 32 divisors (see below), whose sum is σ = 527472000. Its totient is φ = 91425984.

The previous prime is 231498433. The next prime is 231498461. The reversal of 231498440 is 44894132.

It is a self number, because there is not a number n which added to its sum of digits gives 231498440.

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 7 ways as a sum of consecutive naturals, for example, 33470 + ... + 39789.

It is an arithmetic number, because the mean of its divisors is an integer number (16483500).

Almost surely, 2^231498440 is an apocalyptic number.

231498440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231498440 is an abundant number, since it is smaller than the sum of its proper divisors (295973560).

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

231498440 is a wasteful number, since it uses less digits than its factorization.

231498440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73349 (or 73345 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 231498440 is about 15215.0727898357. The cubic root of 231498440 is about 614.0202435792.

The spelling of 231498440 in words is "two hundred thirty-one million, four hundred ninety-eight thousand, four hundred forty".