687056070 has 32 divisors (see below), whose sum is σ = 1650394080. Its totient is φ = 183052800.

The previous prime is 687056033. The next prime is 687056077. The reversal of 687056070 is 70650786.

687056070 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687056077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26496 + ... + 45564.

It is an arithmetic number, because the mean of its divisors is an integer number (51574815).

Almost surely, 2^687056070 is an apocalyptic number.

687056070 is an abundant number, since it is smaller than the sum of its proper divisors (963338010).

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

687056070 is a wasteful number, since it uses less digits than its factorization.

687056070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20280.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 687056070 is about 26211.7544243036. The cubic root of 687056070 is about 882.3970759545.

The spelling of 687056070 in words is "six hundred eighty-seven million, fifty-six thousand, seventy".