1325809888 has 24 divisors (see below), whose sum is σ = 2810972808. Its totient is φ = 611912064.

The previous prime is 1325809853. The next prime is 1325809921. The reversal of 1325809888 is 8889085231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1593106 + ... + 1593937.

It is an arithmetic number, because the mean of its divisors is an integer number (117123867).

Almost surely, 2^1325809888 is an apocalyptic number.

It is an amenable number.

1325809888 is an abundant number, since it is smaller than the sum of its proper divisors (1485162920).

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

1325809888 is a wasteful number, since it uses less digits than its factorization.

1325809888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187066 (or 3187058 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 52.

The square root of 1325809888 is about 36411.6724142135. The cubic root of 1325809888 is about 1098.5683546078.

The spelling of 1325809888 in words is "one billion, three hundred twenty-five million, eight hundred nine thousand, eight hundred eighty-eight".