1445684688 has 240 divisors, whose sum is σ = 4872830976. Its totient is φ = 391184640.

The previous prime is 1445684663. The next prime is 1445684701. The reversal of 1445684688 is 8864865441.

It is a happy number.

1445684688 is a `hidden beast` number, since 14 + 4 + 568 + 4 + 68 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2944123 + ... + 2944613.

Almost surely, 2^1445684688 is an apocalyptic number.

1445684688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445684688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436415488).

1445684688 is an abundant number, since it is smaller than the sum of its proper divisors (3427146288).

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

1445684688 is a wasteful number, since it uses less digits than its factorization.

1445684688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 653 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 54.

The square root of 1445684688 is about 38022.1604856957. The cubic root of 1445684688 is about 1130.7272547175.

The spelling of 1445684688 in words is "one billion, four hundred forty-five million, six hundred eighty-four thousand, six hundred eighty-eight".