256940037 has 6 divisors (see below), whose sum is σ = 371135622. Its totient is φ = 171293352.

The previous prime is 256940027. The next prime is 256940039. The reversal of 256940037 is 730049652.

It can be written as a sum of positive squares in only one way, i.e., 223831521 + 33108516 = 14961^2 + 5754^2 .

It is not a de Polignac number, because 256940037 - 2⁶ = 256939973 is a prime.

It is a super-2 number, since 2×256940037² = 132036365227122738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256939983 and 256940010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256940039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14274438 + ... + 14274455.

It is an arithmetic number, because the mean of its divisors is an integer number (61855937).

Almost surely, 2^256940037 is an apocalyptic number.

It is an amenable number.

256940037 is a deficient number, since it is larger than the sum of its proper divisors (114195585).

256940037 is a wasteful number, since it uses less digits than its factorization.

256940037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28548899 (or 28548896 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 256940037 is about 16029.3492381943. The cubic root of 256940037 is about 635.7366671195.

Adding to 256940037 its reverse (730049652), we get a palindrome (986989689).

The spelling of 256940037 in words is "two hundred fifty-six million, nine hundred forty thousand, thirty-seven".