681045248 has 36 divisors (see below), whose sum is σ = 1464008868. Its totient is φ = 314327040.

The previous prime is 681045229. The next prime is 681045257. The reversal of 681045248 is 842540186.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40347904 + 640697344 = 6352^2 + 25312^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 98993 + ... + 105648.

It is an arithmetic number, because the mean of its divisors is an integer number (40666913).

Almost surely, 2^681045248 is an apocalyptic number.

It is an amenable number.

681045248 is an abundant number, since it is smaller than the sum of its proper divisors (782963620).

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

681045248 is a wasteful number, since it uses less digits than its factorization.

681045248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204670 (or 204656 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 681045248 is about 26096.8436405631. The cubic root of 681045248 is about 879.8162701828.

The spelling of 681045248 in words is "six hundred eighty-one million, forty-five thousand, two hundred forty-eight".