681584298 has 32 divisors (see below), whose sum is σ = 1449762624. Its totient is φ = 212881152.

The previous prime is 681584273. The next prime is 681584317. The reversal of 681584298 is 892485186.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 681584298.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8436 + ... + 37872.

It is an arithmetic number, because the mean of its divisors is an integer number (45305082).

Almost surely, 2^681584298 is an apocalyptic number.

681584298 is an abundant number, since it is smaller than the sum of its proper divisors (768178326).

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

681584298 is a wasteful number, since it uses less digits than its factorization.

681584298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29686.

The product of its digits is 1105920, while the sum is 51.

The square root of 681584298 is about 26107.1694750695. The cubic root of 681584298 is about 880.0483349828.

The spelling of 681584298 in words is "six hundred eighty-one million, five hundred eighty-four thousand, two hundred ninety-eight".