681848140 has 12 divisors (see below), whose sum is σ = 1431881136. Its totient is φ = 272739248.

The previous prime is 681848107. The next prime is 681848221. The reversal of 681848140 is 41848186.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 681848093 and 681848102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17046184 + ... + 17046223.

It is an arithmetic number, because the mean of its divisors is an integer number (119323428).

Almost surely, 2^681848140 is an apocalyptic number.

It is an amenable number.

681848140 is an abundant number, since it is smaller than the sum of its proper divisors (750032996).

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

681848140 is a wasteful number, since it uses less digits than its factorization.

681848140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34092416 (or 34092414 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 681848140 is about 26112.2220425608. Note that the first 3 decimals coincide. The cubic root of 681848140 is about 880.1618762127.

The spelling of 681848140 in words is "six hundred eighty-one million, eight hundred forty-eight thousand, one hundred forty".