1687401306 has 48 divisors (see below), whose sum is σ = 3701617920. Its totient is φ = 555497280.

The previous prime is 1687401301. The next prime is 1687401307. The reversal of 1687401306 is 6031047861.

It is not an unprimeable number, because it can be changed into a prime (1687401301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 524230 + ... + 527438.

It is an arithmetic number, because the mean of its divisors is an integer number (77117040).

Almost surely, 2^1687401306 is an apocalyptic number.

1687401306 is an abundant number, since it is smaller than the sum of its proper divisors (2014216614).

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

1687401306 is a wasteful number, since it uses less digits than its factorization.

1687401306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571 (or 3568 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1687401306 is about 41077.9905302097. The cubic root of 1687401306 is about 1190.5275786037.

The spelling of 1687401306 in words is "one billion, six hundred eighty-seven million, four hundred one thousand, three hundred six".