1687601328 has 80 divisors (see below), whose sum is σ = 5104006656. Its totient is φ = 470407680.

The previous prime is 1687601327. The next prime is 1687601341. The reversal of 1687601328 is 8231067861.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1687601328.

It is not an unprimeable number, because it can be changed into a prime (1687601327) 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, 47476 + ... + 75027.

Almost surely, 2^1687601328 is an apocalyptic number.

It is an amenable number.

1687601328 is an abundant number, since it is smaller than the sum of its proper divisors (3416405328).

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

1687601328 is a wasteful number, since it uses less digits than its factorization.

1687601328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122562 (or 122556 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1687601328 is about 41080.4251195140. The cubic root of 1687601328 is about 1190.5746178583.

The spelling of 1687601328 in words is "one billion, six hundred eighty-seven million, six hundred one thousand, three hundred twenty-eight".