1149197280 has 768 divisors, whose sum is σ = 5016453120. Its totient is φ = 213811200.

The previous prime is 1149197243. The next prime is 1149197293. The reversal of 1149197280 is 827919411.

1149197280 = T₃₇₇₃ + T₃₇₇₄ + ... + T₃₉₂₇.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19477891 + ... + 19477949.

It is an arithmetic number, because the mean of its divisors is an integer number (6531840).

Almost surely, 2^1149197280 is an apocalyptic number.

1149197280 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 1149197280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2508226560).

1149197280 is an abundant number, since it is smaller than the sum of its proper divisors (3867255840).

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

1149197280 is a wasteful number, since it uses less digits than its factorization.

1149197280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1149197280 is about 33899.8123888614. The cubic root of 1149197280 is about 1047.4457279218.

The spelling of 1149197280 in words is "one billion, one hundred forty-nine million, one hundred ninety-seven thousand, two hundred eighty".