256200040 has 32 divisors (see below), whose sum is σ = 577269000. Its totient is φ = 102334464.

The previous prime is 256200011. The next prime is 256200053. The reversal of 256200040 is 40002652.

256200040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 141752836 + 114447204 = 11906^2 + 10698^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256199990 and 256200017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26596 + ... + 34924.

Almost surely, 2^256200040 is an apocalyptic number.

256200040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256200040 is an abundant number, since it is smaller than the sum of its proper divisors (321068960).

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

256200040 is a wasteful number, since it uses less digits than its factorization.

256200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9109 (or 9105 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 256200040 is about 16006.2500292854. The cubic root of 256200040 is about 635.1257650748.

Adding to 256200040 its reverse (40002652), we get a palindrome (296202692).

The spelling of 256200040 in words is "two hundred fifty-six million, two hundred thousand, forty".