256550340 has 48 divisors (see below), whose sum is σ = 725332608. Its totient is φ = 67747584.

The previous prime is 256550317. The next prime is 256550347. The reversal of 256550340 is 43055652.

256550340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 256550298 and 256550307.

It is not an unprimeable number, because it can be changed into a prime (256550347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14577 + ... + 26936.

It is an arithmetic number, because the mean of its divisors is an integer number (15111096).

Almost surely, 2^256550340 is an apocalyptic number.

256550340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256550340 is an abundant number, since it is smaller than the sum of its proper divisors (468782268).

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

256550340 is a wasteful number, since it uses less digits than its factorization.

256550340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41628 (or 41626 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 256550340 is about 16017.1888919373. The cubic root of 256550340 is about 635.4151004864.

The spelling of 256550340 in words is "two hundred fifty-six million, five hundred fifty thousand, three hundred forty".