256512436 has 12 divisors (see below), whose sum is σ = 453255712. Its totient is φ = 127010808.

The previous prime is 256512433. The next prime is 256512449. The reversal of 256512436 is 634215652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256512433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310890 + ... + 311713.

Almost surely, 2^256512436 is an apocalyptic number.

It is an amenable number.

256512436 is a deficient number, since it is larger than the sum of its proper divisors (196743276).

256512436 is a wasteful number, since it uses less digits than its factorization.

256512436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622710 (or 622708 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 256512436 is about 16016.0056193796. The cubic root of 256512436 is about 635.3838058353.

The spelling of 256512436 in words is "two hundred fifty-six million, five hundred twelve thousand, four hundred thirty-six".