256549332 has 24 divisors (see below), whose sum is σ = 644662816. Its totient is φ = 78938208.

The previous prime is 256549331. The next prime is 256549333. The reversal of 256549332 is 233945652.

256549332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256549331) and next prime (256549333).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256549331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822118 + ... + 822429.

Almost surely, 2^256549332 is an apocalyptic number.

It is an amenable number.

256549332 is an abundant number, since it is smaller than the sum of its proper divisors (388113484).

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

256549332 is a wasteful number, since it uses less digits than its factorization.

256549332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644567 (or 1644565 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

The square root of 256549332 is about 16017.1574257107. The cubic root of 256549332 is about 635.4142682921.

The spelling of 256549332 in words is "two hundred fifty-six million, five hundred forty-nine thousand, three hundred thirty-two".