687452538 has 16 divisors (see below), whose sum is σ = 1376383680. Its totient is φ = 228904416.

The previous prime is 687452527. The next prime is 687452539. The reversal of 687452538 is 835254786.

It is not an unprimeable number, because it can be changed into a prime (687452539) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 55518 + ... + 66761.

It is an arithmetic number, because the mean of its divisors is an integer number (86023980).

Almost surely, 2^687452538 is an apocalyptic number.

687452538 is an abundant number, since it is smaller than the sum of its proper divisors (688931142).

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

687452538 is a wasteful number, since it uses less digits than its factorization.

687452538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123221.

The product of its digits is 1612800, while the sum is 48.

The square root of 687452538 is about 26219.3161238046. The cubic root of 687452538 is about 882.5667733771.

The spelling of 687452538 in words is "six hundred eighty-seven million, four hundred fifty-two thousand, five hundred thirty-eight".