233420440 has 32 divisors (see below), whose sum is σ = 572942160. Its totient is φ = 84880000.

The previous prime is 233420419. The next prime is 233420443. The reversal of 233420440 is 44024332.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233420443) 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, 264811 + ... + 265690.

Almost surely, 2^233420440 is an apocalyptic number.

233420440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233420440 is an abundant number, since it is smaller than the sum of its proper divisors (339521720).

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

233420440 is a wasteful number, since it uses less digits than its factorization.

233420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530523 (or 530519 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 233420440 is about 15278.1032854213. The cubic root of 233420440 is about 615.7148494694.

Adding to 233420440 its reverse (44024332), we get a palindrome (277444772).

The spelling of 233420440 in words is "two hundred thirty-three million, four hundred twenty thousand, four hundred forty".