231890364 has 120 divisors (see below), whose sum is σ = 645075200. Its totient is φ = 72433440.

The previous prime is 231890363. The next prime is 231890369. The reversal of 231890364 is 463098132.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231890363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 855549 + ... + 855819.

Almost surely, 2^231890364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231890364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322537600).

231890364 is an abundant number, since it is smaller than the sum of its proper divisors (413184836).

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

231890364 is a wasteful number, since it uses less digits than its factorization.

231890364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 231890364 is about 15227.9468084177. The cubic root of 231890364 is about 614.3665577806.

The spelling of 231890364 in words is "two hundred thirty-one million, eight hundred ninety thousand, three hundred sixty-four".