681971048 has 32 divisors (see below), whose sum is σ = 1476999360. Its totient is φ = 291751680.

The previous prime is 681971041. The next prime is 681971051. The reversal of 681971048 is 840179186.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (681971041) 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, 226436 + ... + 229427.

It is an arithmetic number, because the mean of its divisors is an integer number (46156230).

Almost surely, 2^681971048 is an apocalyptic number.

681971048 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

681971048 is an abundant number, since it is smaller than the sum of its proper divisors (795028312).

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

681971048 is a wasteful number, since it uses less digits than its factorization.

681971048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455897 (or 455893 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 681971048 is about 26114.5753938294. The cubic root of 681971048 is about 880.2147581915.

The spelling of 681971048 in words is "six hundred eighty-one million, nine hundred seventy-one thousand, forty-eight".