255409040 has 20 divisors (see below), whose sum is σ = 593826204. Its totient is φ = 102163584.

The previous prime is 255408991. The next prime is 255409057. The reversal of 255409040 is 40904552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 182682256 + 72726784 = 13516^2 + 8528^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 255408994 and 255409012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596227 + ... + 1596386.

Almost surely, 2^255409040 is an apocalyptic number.

255409040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255409040 is an abundant number, since it is smaller than the sum of its proper divisors (338417164).

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

255409040 is a wasteful number, since it uses less digits than its factorization.

255409040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192626 (or 3192620 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 255409040 is about 15981.5218299134. The cubic root of 255409040 is about 634.4714555300.

The spelling of 255409040 in words is "two hundred fifty-five million, four hundred nine thousand, forty".