1255637888 has 64 divisors (see below), whose sum is σ = 2621253120. Its totient is φ = 598371840.

The previous prime is 1255637881. The next prime is 1255637927. The reversal of 1255637888 is 8887365521.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1255637888² = 3153253011562201088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255637881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263495 + ... + 268217.

It is an arithmetic number, because the mean of its divisors is an integer number (40957080).

Almost surely, 2^1255637888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255637888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1310626560).

1255637888 is an abundant number, since it is smaller than the sum of its proper divisors (1365615232).

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

1255637888 is an equidigital number, since it uses as much as digits as its factorization.

1255637888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4835 (or 4823 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 53.

The square root of 1255637888 is about 35434.9811344665. The cubic root of 1255637888 is about 1078.8344444386.

The spelling of 1255637888 in words is "one billion, two hundred fifty-five million, six hundred thirty-seven thousand, eight hundred eighty-eight".