255329840 has 20 divisors (see below), whose sum is σ = 593642064. Its totient is φ = 102131904.

The previous prime is 255329839. The next prime is 255329843. The reversal of 255329840 is 48923552.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 255329794 and 255329803.

It is not an unprimeable number, because it can be changed into a prime (255329843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595732 + ... + 1595891.

Almost surely, 2^255329840 is an apocalyptic number.

255329840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255329840 is an abundant number, since it is smaller than the sum of its proper divisors (338312224).

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

255329840 is a wasteful number, since it uses less digits than its factorization.

255329840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191636 (or 3191630 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 255329840 is about 15979.0437761463. The cubic root of 255329840 is about 634.4058674910.

The spelling of 255329840 in words is "two hundred fifty-five million, three hundred twenty-nine thousand, eight hundred forty".