69888564 has 36 divisors (see below), whose sum is σ = 187056324. Its totient is φ = 21925632.

The previous prime is 69888557. The next prime is 69888569. The reversal of 69888564 is 46588896.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53144100 + 16744464 = 7290^2 + 4092^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×69888564² = 9768822755964192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 69888564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69888569) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 56487 + ... + 57710.

It is an arithmetic number, because the mean of its divisors is an integer number (5196009).

Almost surely, 2^69888564 is an apocalyptic number.

It is an amenable number.

69888564 is an abundant number, since it is smaller than the sum of its proper divisors (117167760).

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

69888564 is a wasteful number, since it uses less digits than its factorization.

69888564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114224 (or 114219 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 69888564 is about 8359.9380380479. The cubic root of 69888564 is about 411.9097188049.

The spelling of 69888564 in words is "sixty-nine million, eight hundred eighty-eight thousand, five hundred sixty-four".