791216728 has 8 divisors (see below), whose sum is σ = 1483531380. Its totient is φ = 395608360.

The previous prime is 791216717. The next prime is 791216779. The reversal of 791216728 is 827612197.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49451038 + ... + 49451053.

Almost surely, 2^791216728 is an apocalyptic number.

It is an amenable number.

791216728 is a deficient number, since it is larger than the sum of its proper divisors (692314652).

791216728 is a wasteful number, since it uses less digits than its factorization.

791216728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98902097 (or 98902093 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 791216728 is about 28128.5749372413. The cubic root of 791216728 is about 924.9078955772.

It can be divided in two parts, 79121 and 6728, that added together give a square (85849 = 293²).

The spelling of 791216728 in words is "seven hundred ninety-one million, two hundred sixteen thousand, seven hundred twenty-eight".