687543552 has 180 divisors, whose sum is σ = 2083457376. Its totient is φ = 225469440.

The previous prime is 687543547. The next prime is 687543553. The reversal of 687543552 is 255345786.

It is a super-2 number, since 2×687543552² = 945432271793553408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687543498 and 687543507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687543553) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1472023 + ... + 1472489.

Almost surely, 2^687543552 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 687543552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041728688).

687543552 is an abundant number, since it is smaller than the sum of its proper divisors (1395913824).

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

687543552 is an equidigital number, since it uses as much as digits as its factorization.

687543552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 543 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 687543552 is about 26221.0516951552. The cubic root of 687543552 is about 882.6057202538.

The spelling of 687543552 in words is "six hundred eighty-seven million, five hundred forty-three thousand, five hundred fifty-two".