255241840 has 40 divisors (see below), whose sum is σ = 678215520. Its totient is φ = 87511296.

The previous prime is 255241829. The next prime is 255241843. The reversal of 255241840 is 48142552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255241843) 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, 227335 + ... + 228454.

It is an arithmetic number, because the mean of its divisors is an integer number (16955388).

Almost surely, 2^255241840 is an apocalyptic number.

255241840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255241840 is an abundant number, since it is smaller than the sum of its proper divisors (422973680).

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

255241840 is a wasteful number, since it uses less digits than its factorization.

255241840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455809 (or 455803 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 255241840 is about 15976.2899322715. The cubic root of 255241840 is about 634.3329759830.

The spelling of 255241840 in words is "two hundred fifty-five million, two hundred forty-one thousand, eight hundred forty".