1686811392 has 180 divisors, whose sum is σ = 5748799056. Its totient is φ = 481904640.

The previous prime is 1686811387. The next prime is 1686811453. The reversal of 1686811392 is 2931186861.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 139342 + ... + 150962.

Almost surely, 2^1686811392 is an apocalyptic number.

1686811392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1686811392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2874399528).

1686811392 is an abundant number, since it is smaller than the sum of its proper divisors (4061987664).

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

1686811392 is an equidigital number, since it uses as much as digits as its factorization.

1686811392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11656 (or 11633 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1686811392 is about 41070.8094880050. The cubic root of 1686811392 is about 1190.3888266381.

The spelling of 1686811392 in words is "one billion, six hundred eighty-six million, eight hundred eleven thousand, three hundred ninety-two".