256002408 has 48 divisors (see below), whose sum is σ = 712086180. Its totient is φ = 83026944.

The previous prime is 256002361. The next prime is 256002419. The reversal of 256002408 is 804200652.

256002408 is a `hidden beast` number, since 256 + 0 + 0 + 2 + 408 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 254147364 + 1855044 = 15942^2 + 1362^2 .

It is a super-3 number, since 3×256002408³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45385 + ... + 50712.

Almost surely, 2^256002408 is an apocalyptic number.

It is an amenable number.

256002408 is an abundant number, since it is smaller than the sum of its proper divisors (456083772).

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

256002408 is a wasteful number, since it uses less digits than its factorization.

256002408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96146 (or 96139 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 256002408 is about 16000.0752498230. The cubic root of 256002408 is about 634.9624116465.

The spelling of 256002408 in words is "two hundred fifty-six million, two thousand, four hundred eight".