1075989780 has 72 divisors (see below), whose sum is σ = 3287734632. Its totient is φ = 284829696.

The previous prime is 1075989751. The next prime is 1075989781. The reversal of 1075989780 is 879895701.

It can be written as a sum of positive squares in 4 ways, for example, as 367258896 + 708730884 = 19164^2 + 26622^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1075989781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2844 + ... + 46476.

It is an arithmetic number, because the mean of its divisors is an integer number (45662981).

Almost surely, 2^1075989780 is an apocalyptic number.

1075989780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1075989780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643867316).

1075989780 is an abundant number, since it is smaller than the sum of its proper divisors (2211744852).

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

1075989780 is a wasteful number, since it uses less digits than its factorization.

1075989780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43785 (or 43780 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The square root of 1075989780 is about 32802.2831522441. The cubic root of 1075989780 is about 1024.7141078534.

The spelling of 1075989780 in words is "one billion, seventy-five million, nine hundred eighty-nine thousand, seven hundred eighty".