255399040 has 64 divisors (see below), whose sum is σ = 657551160. Its totient is φ = 94298112.

The previous prime is 255399019. The next prime is 255399073. The reversal of 255399040 is 40993552.

It can be written as a sum of positive squares in 4 ways, for example, as 98247744 + 157151296 = 9912^2 + 12536^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7029 + ... + 23668.

Almost surely, 2^255399040 is an apocalyptic number.

255399040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255399040 is an abundant number, since it is smaller than the sum of its proper divisors (402152120).

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

255399040 is a wasteful number, since it uses less digits than its factorization.

255399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30729 (or 30717 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 255399040 is about 15981.2089655320. The cubic root of 255399040 is about 634.4631749599.

The spelling of 255399040 in words is "two hundred fifty-five million, three hundred ninety-nine thousand, forty".