256235436 has 36 divisors (see below), whose sum is σ = 648684400. Its totient is φ = 85282848.

The previous prime is 256235417. The next prime is 256235489. The reversal of 256235436 is 634532652.

256235436 is a `hidden beast` number, since 25 + 623 + 5 + 4 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×256235436² = 131313197324220192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 256235436.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20505 + ... + 30543.

Almost surely, 2^256235436 is an apocalyptic number.

It is an amenable number.

256235436 is an abundant number, since it is smaller than the sum of its proper divisors (392448964).

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

256235436 is a wasteful number, since it uses less digits than its factorization.

256235436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10758 (or 10753 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 256235436 is about 16007.3556841847. The cubic root of 256235436 is about 635.1550128927.

The spelling of 256235436 in words is "two hundred fifty-six million, two hundred thirty-five thousand, four hundred thirty-six".