821268734 has 32 divisors (see below), whose sum is σ = 1450643040. Its totient is φ = 343785600.

The previous prime is 821268733. The next prime is 821268743. The reversal of 821268734 is 437862128.

It is a junction number, because it is equal to n+sod(n) for n = 821268691 and 821268700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821268733) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 128732 + ... + 134960.

It is an arithmetic number, because the mean of its divisors is an integer number (45332595).

Almost surely, 2^821268734 is an apocalyptic number.

821268734 is a deficient number, since it is larger than the sum of its proper divisors (629374306).

821268734 is a wasteful number, since it uses less digits than its factorization.

821268734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6716.

The product of its digits is 129024, while the sum is 41.

The square root of 821268734 is about 28657.7866207424. The cubic root of 821268734 is about 936.4726463015.

The spelling of 821268734 in words is "eight hundred twenty-one million, two hundred sixty-eight thousand, seven hundred thirty-four".