231490 has 16 divisors (see below), whose sum is σ = 476352. Its totient is φ = 79344.

The previous prime is 231481. The next prime is 231493. The reversal of 231490 is 94132.

It is not an unprimeable number, because it can be changed into a prime (231493) by changing a digit.

231490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1584 + ... + 1723.

It is an arithmetic number, because the mean of its divisors is an integer number (29772).

2²³¹⁴⁹⁰ is an apocalyptic number.

231490 is an abundant number, since it is smaller than the sum of its proper divisors (244862).

It is a weird number, because it is abundant, but not a pseudoperfect number.

231490 is a wasteful number, since it uses less digits than its factorization.

231490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 231490 is about 481.1340769474. The cubic root of 231490 is about 61.4012781479.

The spelling of 231490 in words is "two hundred thirty-one thousand, four hundred ninety".