797407978 has 8 divisors (see below), whose sum is σ = 1234696320. Its totient is φ = 385842540.

The previous prime is 797407973. The next prime is 797407991. The reversal of 797407978 is 879704797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (797407973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6430648 + ... + 6430771.

It is an arithmetic number, because the mean of its divisors is an integer number (154337040).

Almost surely, 2^797407978 is an apocalyptic number.

797407978 is a deficient number, since it is larger than the sum of its proper divisors (437288342).

797407978 is a wasteful number, since it uses less digits than its factorization.

797407978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12861452.

The product of its (nonzero) digits is 6223392, while the sum is 58.

The square root of 797407978 is about 28238.4131636323. The cubic root of 797407978 is about 927.3140902634.

The spelling of 797407978 in words is "seven hundred ninety-seven million, four hundred seven thousand, nine hundred seventy-eight".