255649446 has 80 divisors (see below), whose sum is σ = 649479600. Its totient is φ = 74509632.

The previous prime is 255649367. The next prime is 255649447. The reversal of 255649446 is 644946552.

255649446 is a `hidden beast` number, since 2 + 556 + 4 + 94 + 4 + 6 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255649447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 36820 + ... + 43208.

It is an arithmetic number, because the mean of its divisors is an integer number (8118495).

Almost surely, 2^255649446 is an apocalyptic number.

255649446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 255649446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324739800).

255649446 is an abundant number, since it is smaller than the sum of its proper divisors (393830154).

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

255649446 is a wasteful number, since it uses less digits than its factorization.

255649446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6435 (or 6426 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 255649446 is about 15989.0414346827. The cubic root of 255649446 is about 634.6704603796.

The spelling of 255649446 in words is "two hundred fifty-five million, six hundred forty-nine thousand, four hundred forty-six".