1084138965 has 128 divisors (see below), whose sum is σ = 2421888000. Its totient is φ = 457228800.

The previous prime is 1084138907. The next prime is 1084138997. The reversal of 1084138965 is 5698314801.

It is not a de Polignac number, because 1084138965 - 2¹⁶ = 1084073429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1084138965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 601065 + ... + 602865.

It is an arithmetic number, because the mean of its divisors is an integer number (18921000).

Almost surely, 2^1084138965 is an apocalyptic number.

1084138965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1084138965 is an abundant number, since it is smaller than the sum of its proper divisors (1337749035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1084138965 is a wasteful number, since it uses less digits than its factorization.

1084138965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1829 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1084138965 is about 32926.2655793213. The cubic root of 1084138965 is about 1027.2945510698.

The spelling of 1084138965 in words is "one billion, eighty-four million, one hundred thirty-eight thousand, nine hundred sixty-five".