266256040 has 32 divisors (see below), whose sum is σ = 634317480. Its totient is φ = 100237312.

The previous prime is 266256037. The next prime is 266256071. The reversal of 266256040 is 40652662.

It can be written as a sum of positive squares in 4 ways, for example, as 258759396 + 7496644 = 16086^2 + 2738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 266255993 and 266256011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195097 + ... + 196456.

Almost surely, 2^266256040 is an apocalyptic number.

266256040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266256040 is an abundant number, since it is smaller than the sum of its proper divisors (368061440).

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

266256040 is a wasteful number, since it uses less digits than its factorization.

266256040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391581 (or 391577 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 266256040 is about 16317.3539521578. The cubic root of 266256040 is about 643.3290402737.

It can be divided in two parts, 2662560 and 40, that multiplied together give a square (106502400 = 10320²).

The spelling of 266256040 in words is "two hundred sixty-six million, two hundred fifty-six thousand, forty".