687228305 has 16 divisors (see below), whose sum is σ = 857516544. Its totient is φ = 528147840.

The previous prime is 687228299. The next prime is 687228319. The reversal of 687228305 is 503822786.

It is not a de Polignac number, because 687228305 - 2¹⁶ = 687162769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5054 + ... + 37416.

It is an arithmetic number, because the mean of its divisors is an integer number (53594784).

Almost surely, 2^687228305 is an apocalyptic number.

It is an amenable number.

687228305 is a deficient number, since it is larger than the sum of its proper divisors (170288239).

687228305 is a wasteful number, since it uses less digits than its factorization.

687228305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32536.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 687228305 is about 26215.0396719135. The cubic root of 687228305 is about 882.4708045137.

The spelling of 687228305 in words is "six hundred eighty-seven million, two hundred twenty-eight thousand, three hundred five".