681301040 has 60 divisors (see below), whose sum is σ = 1811956944. Its totient is φ = 233377152.

The previous prime is 681301037. The next prime is 681301099. The reversal of 681301040 is 40103186.

It is a super-2 number, since 2×681301040² = 928342214210163200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681300997 and 681301015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617129 + ... + 618231.

Almost surely, 2^681301040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681301040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905978472).

681301040 is an abundant number, since it is smaller than the sum of its proper divisors (1130655904).

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

681301040 is an equidigital number, since it uses as much as digits as its factorization.

681301040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 681301040 is about 26101.7440030355. The cubic root of 681301040 is about 879.9264056912.

The spelling of 681301040 in words is "six hundred eighty-one million, three hundred one thousand, forty".