1026026639 has 10 divisors (see below), whose sum is σ = 1128638400. Its totient is φ = 932738180.

The previous prime is 1026026633. The next prime is 1026026663. The reversal of 1026026639 is 9366206201.

It is not a de Polignac number, because 1026026639 - 2²⁸ = 757591183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1026026599 and 1026026608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026026633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20399 + ... + 49680.

It is an arithmetic number, because the mean of its divisors is an integer number (112863840).

Almost surely, 2^1026026639 is an apocalyptic number.

1026026639 is a deficient number, since it is larger than the sum of its proper divisors (102611761).

1026026639 is an frugal number, since it uses more digits than its factorization.

1026026639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70123 (or 70090 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 1026026639 is about 32031.6505818854. The cubic root of 1026026639 is about 1008.6013509761.

The spelling of 1026026639 in words is "one billion, twenty-six million, twenty-six thousand, six hundred thirty-nine".