687130272 has 72 divisors (see below), whose sum is σ = 1956558240. Its totient is φ = 228746880.

The previous prime is 687130253. The next prime is 687130273. The reversal of 687130272 is 272031786.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (687130273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 434379 + ... + 435957.

It is an arithmetic number, because the mean of its divisors is an integer number (27174420).

Almost surely, 2^687130272 is an apocalyptic number.

It is an amenable number.

687130272 is an abundant number, since it is smaller than the sum of its proper divisors (1269427968).

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

687130272 is a wasteful number, since it uses less digits than its factorization.

687130272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106 (or 3095 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 687130272 is about 26213.1698197681. The cubic root of 687130272 is about 882.4288410819.

The spelling of 687130272 in words is "six hundred eighty-seven million, one hundred thirty thousand, two hundred seventy-two".