231761838 has 64 divisors (see below), whose sum is σ = 580649472. Its totient is φ = 59911680.

The previous prime is 231761837. The next prime is 231761843. The reversal of 231761838 is 838167132.

It is a junction number, because it is equal to n+sod(n) for n = 231761796 and 231761805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231761837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106570 + ... + 108722.

It is an arithmetic number, because the mean of its divisors is an integer number (9072648).

Almost surely, 2^231761838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231761838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290324736).

231761838 is an abundant number, since it is smaller than the sum of its proper divisors (348887634).

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

231761838 is a wasteful number, since it uses less digits than its factorization.

231761838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409.

The product of its digits is 48384, while the sum is 39.

The square root of 231761838 is about 15223.7261536064. The cubic root of 231761838 is about 614.2530319062.

The spelling of 231761838 in words is "two hundred thirty-one million, seven hundred sixty-one thousand, eight hundred thirty-eight".