826438642 has 16 divisors (see below), whose sum is σ = 1258790400. Its totient is φ = 406885248.

The previous prime is 826438637. The next prime is 826438643. The reversal of 826438642 is 246834628.

826438642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (826438643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27903 + ... + 49309.

It is an arithmetic number, because the mean of its divisors is an integer number (78674400).

Almost surely, 2^826438642 is an apocalyptic number.

826438642 is a deficient number, since it is larger than the sum of its proper divisors (432351758).

826438642 is a wasteful number, since it uses less digits than its factorization.

826438642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21705.

The product of its digits is 442368, while the sum is 43.

The square root of 826438642 is about 28747.8458671254. The cubic root of 826438642 is about 938.4335772087.

The spelling of 826438642 in words is "eight hundred twenty-six million, four hundred thirty-eight thousand, six hundred forty-two".