1681878040 has 32 divisors (see below), whose sum is σ = 3785544000. Its totient is φ = 672516864.

The previous prime is 1681878007. The next prime is 1681878041. The reversal of 1681878040 is 408781861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681878041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151396 + ... + 162124.

It is an arithmetic number, because the mean of its divisors is an integer number (118298250).

Almost surely, 2^1681878040 is an apocalyptic number.

1681878040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681878040 is an abundant number, since it is smaller than the sum of its proper divisors (2103665960).

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

1681878040 is a wasteful number, since it uses less digits than its factorization.

1681878040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14659 (or 14655 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 1681878040 is about 41010.7064069860. The cubic root of 1681878040 is about 1189.2271987335.

The spelling of 1681878040 in words is "one billion, six hundred eighty-one million, eight hundred seventy-eight thousand, forty".