255433440 has 48 divisors (see below), whose sum is σ = 804616848. Its totient is φ = 68115456.

The previous prime is 255433433. The next prime is 255433441. The reversal of 255433440 is 44334552.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 255433398 and 255433407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255433441) 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, 265597 + ... + 266556.

It is an arithmetic number, because the mean of its divisors is an integer number (16762851).

Almost surely, 2^255433440 is an apocalyptic number.

255433440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255433440 is an abundant number, since it is smaller than the sum of its proper divisors (549183408).

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

255433440 is a wasteful number, since it uses less digits than its factorization.

255433440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532171 (or 532163 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

The square root of 255433440 is about 15982.2851933007. The cubic root of 255433440 is about 634.4916592139.

Adding to 255433440 its reverse (44334552), we get a palindrome (299767992).

The spelling of 255433440 in words is "two hundred fifty-five million, four hundred thirty-three thousand, four hundred forty".