233440 has 24 divisors (see below), whose sum is σ = 551880. Its totient is φ = 93312.

The previous prime is 233437. The next prime is 233477. The reversal of 233440 is 44332.

233440 = 26² + 27² + ... + 89².

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570 + ... + 889.

It is an arithmetic number, because the mean of its divisors is an integer number (22995).

2²³³⁴⁴⁰ is an apocalyptic number.

233440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233440 is an abundant number, since it is smaller than the sum of its proper divisors (318440).

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

233440 is a wasteful number, since it uses less digits than its factorization.

233440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 233440 is about 483.1562894137. The cubic root of 233440 is about 61.5732047401.

Adding to 233440 its reverse (44332), we get a palindrome (277772).

The spelling of 233440 in words is "two hundred thirty-three thousand, four hundred forty".