233891380 has 24 divisors (see below), whose sum is σ = 508110120. Its totient is φ = 90330240.

The previous prime is 233891369. The next prime is 233891381. The reversal of 233891380 is 83198332.

It can be written as a sum of positive squares in 4 ways, for example, as 101042704 + 132848676 = 10052^2 + 11526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233891381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201051 + ... + 202210.

It is an arithmetic number, because the mean of its divisors is an integer number (21171255).

Almost surely, 2^233891380 is an apocalyptic number.

233891380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233891380 is an abundant number, since it is smaller than the sum of its proper divisors (274218740).

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

233891380 is a wasteful number, since it uses less digits than its factorization.

233891380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403299 (or 403297 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 233891380 is about 15293.5077729081. The cubic root of 233891380 is about 616.1286520800.

The spelling of 233891380 in words is "two hundred thirty-three million, eight hundred ninety-one thousand, three hundred eighty".