1026386642 has 8 divisors (see below), whose sum is σ = 1540309500. Its totient is φ = 512950144.

The previous prime is 1026386609. The next prime is 1026386663. The reversal of 1026386642 is 2466836201.

It can be written as a sum of positive squares in 2 ways, for example, as 824206681 + 202179961 = 28709^2 + 14219^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1026386596 and 1026386605.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 116267 + ... + 124782.

Almost surely, 2^1026386642 is an apocalyptic number.

1026386642 is a deficient number, since it is larger than the sum of its proper divisors (513922858).

1026386642 is a wasteful number, since it uses less digits than its factorization.

1026386642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243180.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 1026386642 is about 32037.2695777902. The cubic root of 1026386642 is about 1008.7193001728.

The spelling of 1026386642 in words is "one billion, twenty-six million, three hundred eighty-six thousand, six hundred forty-two".