255404440 has 32 divisors (see below), whose sum is σ = 579942000. Its totient is φ = 101222784.

The previous prime is 255404437. The next prime is 255404453. The reversal of 255404440 is 44404552.

255404440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 255404399 and 255404408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24930 + ... + 33649.

Almost surely, 2^255404440 is an apocalyptic number.

255404440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255404440 is an abundant number, since it is smaller than the sum of its proper divisors (324537560).

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

255404440 is a wasteful number, since it uses less digits than its factorization.

255404440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58699 (or 58695 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 255404440 is about 15981.3779130587. The cubic root of 255404440 is about 634.4676464946.

Adding to 255404440 its reverse (44404552), we get a palindrome (299808992).

The spelling of 255404440 in words is "two hundred fifty-five million, four hundred four thousand, four hundred forty".