1078726905 has 12 divisors (see below), whose sum is σ = 1869793380. Its totient is φ = 575320992.

The previous prime is 1078726889. The next prime is 1078726963. The reversal of 1078726905 is 5096278701.

It can be written as a sum of positive squares in 2 ways, for example, as 563255289 + 515471616 = 23733^2 + 22704^2 .

It is not a de Polignac number, because 1078726905 - 2⁴ = 1078726889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 23971709 = 1078726905 / (1 + 0 + 7 + 8 + 7 + 2 + 6 + 9 + 0 + 5).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11985810 + ... + 11985899.

It is an arithmetic number, because the mean of its divisors is an integer number (155816115).

Almost surely, 2^1078726905 is an apocalyptic number.

1078726905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1078726905 is a deficient number, since it is larger than the sum of its proper divisors (791066475).

1078726905 is a wasteful number, since it uses less digits than its factorization.

1078726905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23971720 (or 23971717 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 1078726905 is about 32843.9782151919. The cubic root of 1078726905 is about 1025.5822684165.

The spelling of 1078726905 in words is "one billion, seventy-eight million, seven hundred twenty-six thousand, nine hundred five".