1680040831 has 8 divisors (see below), whose sum is σ = 1964699264. Its totient is φ = 1406545560.

The previous prime is 1680040823. The next prime is 1680040889. The reversal of 1680040831 is 1380400861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1680040831 - 2³ = 1680040823 is a prime.

It is a super-2 number, since 2×1680040831² = 5645074387654341122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1680040793 and 1680040802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680040891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2790465 + ... + 2791066.

It is an arithmetic number, because the mean of its divisors is an integer number (245587408).

Almost surely, 2^1680040831 is an apocalyptic number.

1680040831 is a deficient number, since it is larger than the sum of its proper divisors (284658433).

1680040831 is an equidigital number, since it uses as much as digits as its factorization.

1680040831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5581581.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1680040831 is about 40988.3011480105. The cubic root of 1680040831 is about 1188.7940212793.

The spelling of 1680040831 in words is "one billion, six hundred eighty million, forty thousand, eight hundred thirty-one".