780800738 has 8 divisors (see below), whose sum is σ = 1184360940. Its totient is φ = 386013760.

The previous prime is 780800737. The next prime is 780800743. The reversal of 780800738 is 837008087.

It can be written as a sum of positive squares in 2 ways, for example, as 734247409 + 46553329 = 27097^2 + 6823^2 .

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

It is a super-2 number, since 2×780800738² = 1219299584922689288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 780800695 and 780800704.

It is not an unprimeable number, because it can be changed into a prime (780800731) by changing a digit.

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, 2193083 + ... + 2193438.

Almost surely, 2^780800738 is an apocalyptic number.

780800738 is a deficient number, since it is larger than the sum of its proper divisors (403560202).

780800738 is a wasteful number, since it uses less digits than its factorization.

780800738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386612.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 780800738 is about 27942.8119200627. The cubic root of 780800738 is about 920.8312973035.

The spelling of 780800738 in words is "seven hundred eighty million, eight hundred thousand, seven hundred thirty-eight".