826640026 has 4 divisors (see below), whose sum is σ = 1239960042. Its totient is φ = 413320012.

The previous prime is 826639997. The next prime is 826640047. The reversal of 826640026 is 620046628.

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., 657666025 + 168974001 = 25645^2 + 12999^2 .

It is a junction number, because it is equal to n+sod(n) for n = 826639973 and 826640000.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 206660005 + ... + 206660008.

Almost surely, 2^826640026 is an apocalyptic number.

826640026 is a deficient number, since it is larger than the sum of its proper divisors (413320016).

826640026 is a wasteful number, since it uses less digits than its factorization.

826640026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413320015.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 826640026 is about 28751.3482466475. The cubic root of 826640026 is about 938.5097958774.

The spelling of 826640026 in words is "eight hundred twenty-six million, six hundred forty thousand, twenty-six".