1144969280 has 336 divisors, whose sum is σ = 3524408496. Its totient is φ = 350945280.

The previous prime is 1144969277. The next prime is 1144969291. The reversal of 1144969280 is 829694411.

It can be written as a sum of positive squares in 8 ways, for example, as 267387904 + 877581376 = 16352^2 + 29624^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8357372 + ... + 8357508.

It is an arithmetic number, because the mean of its divisors is an integer number (10489311).

Almost surely, 2^1144969280 is an apocalyptic number.

1144969280 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 1144969280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762204248).

1144969280 is an abundant number, since it is smaller than the sum of its proper divisors (2379439216).

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

1144969280 is a wasteful number, since it uses less digits than its factorization.

1144969280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1144969280 is about 33837.3946987649. The cubic root of 1144969280 is about 1046.1596004031.

The spelling of 1144969280 in words is "one billion, one hundred forty-four million, nine hundred sixty-nine thousand, two hundred eighty".