1265528888 has 32 divisors (see below), whose sum is σ = 2586200400. Its totient is φ = 577049088.

The previous prime is 1265528881. The next prime is 1265528893. The reversal of 1265528888 is 8888255621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265528881) 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, 64673 + ... + 81936.

Almost surely, 2^1265528888 is an apocalyptic number.

It is an amenable number.

1265528888 is an abundant number, since it is smaller than the sum of its proper divisors (1320671512).

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

1265528888 is a wasteful number, since it uses less digits than its factorization.

1265528888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146711 (or 146707 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 53.

The square root of 1265528888 is about 35574.2728386681. The cubic root of 1265528888 is about 1081.6597958047.

The spelling of 1265528888 in words is "one billion, two hundred sixty-five million, five hundred twenty-eight thousand, eight hundred eighty-eight".