687889272 has 32 divisors (see below), whose sum is σ = 1965398400. Its totient is φ = 196539744.

The previous prime is 687889247. The next prime is 687889273. The reversal of 687889272 is 272988786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687889273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047122 + ... + 2047457.

It is an arithmetic number, because the mean of its divisors is an integer number (61418700).

Almost surely, 2^687889272 is an apocalyptic number.

It is an amenable number.

687889272 is an abundant number, since it is smaller than the sum of its proper divisors (1277509128).

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

687889272 is a wasteful number, since it uses less digits than its factorization.

687889272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094595 (or 4094591 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The square root of 687889272 is about 26227.6432795629. The cubic root of 687889272 is about 882.7536300694.

The spelling of 687889272 in words is "six hundred eighty-seven million, eight hundred eighty-nine thousand, two hundred seventy-two".