687406536 has 48 divisors (see below), whose sum is σ = 1865483100. Its totient is φ = 228673152.

The previous prime is 687406523. The next prime is 687406547. The reversal of 687406536 is 635604786.

It can be written as a sum of positive squares in 2 ways, for example, as 654848100 + 32558436 = 25590^2 + 5706^2 .

It is a junction number, because it is equal to n+sod(n) for n = 687406491 and 687406500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27270 + ... + 46026.

Almost surely, 2^687406536 is an apocalyptic number.

It is an amenable number.

687406536 is an abundant number, since it is smaller than the sum of its proper divisors (1178076564).

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

687406536 is a wasteful number, since it uses less digits than its factorization.

687406536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19278 (or 19271 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 687406536 is about 26218.4388551264. The cubic root of 687406536 is about 882.5470868097.

The spelling of 687406536 in words is "six hundred eighty-seven million, four hundred six thousand, five hundred thirty-six".