791440018 has 4 divisors (see below), whose sum is σ = 1187160030. Its totient is φ = 395720008.

The previous prime is 791439991. The next prime is 791440021. The reversal of 791440018 is 810044197.

791440018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 723986649 + 67453369 = 26907^2 + 8213^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197860003 + ... + 197860006.

Almost surely, 2^791440018 is an apocalyptic number.

791440018 is a deficient number, since it is larger than the sum of its proper divisors (395720012).

791440018 is a wasteful number, since it uses less digits than its factorization.

791440018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395720011.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 791440018 is about 28132.5437527430. The cubic root of 791440018 is about 924.9948937629.

The spelling of 791440018 in words is "seven hundred ninety-one million, four hundred forty thousand, eighteen".