798668640 has 576 divisors, whose sum is σ = 3557675520. Its totient is φ = 165957120.

The previous prime is 798668639. The next prime is 798668657. The reversal of 798668640 is 46866897.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 72606235 + ... + 72606245.

It is an arithmetic number, because the mean of its divisors is an integer number (6176520).

Almost surely, 2^798668640 is an apocalyptic number.

798668640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 798668640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778837760).

798668640 is an abundant number, since it is smaller than the sum of its proper divisors (2759006880).

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

798668640 is an equidigital number, since it uses as much as digits as its factorization.

798668640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 798668640 is about 28260.7261053215. The cubic root of 798668640 is about 927.8025119787.

The spelling of 798668640 in words is "seven hundred ninety-eight million, six hundred sixty-eight thousand, six hundred forty".