1686431048 has 16 divisors (see below), whose sum is σ = 3163919280. Its totient is φ = 842719248.

The previous prime is 1686431041. The next prime is 1686431053. The reversal of 1686431048 is 8401346861.

It is a junction number, because it is equal to n+sod(n) for n = 1686430996 and 1686431014.

It is not an unprimeable number, because it can be changed into a prime (1686431041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47390 + ... + 74957.

It is an arithmetic number, because the mean of its divisors is an integer number (197744955).

Almost surely, 2^1686431048 is an apocalyptic number.

It is an amenable number.

1686431048 is a deficient number, since it is larger than the sum of its proper divisors (1477488232).

1686431048 is a wasteful number, since it uses less digits than its factorization.

1686431048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124076 (or 124072 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 1686431048 is about 41066.1788823845. The cubic root of 1686431048 is about 1190.2993498727.

The spelling of 1686431048 in words is "one billion, six hundred eighty-six million, four hundred thirty-one thousand, forty-eight".