1152011280 has 320 divisors, whose sum is σ = 4299153408. Its totient is φ = 249661440.

The previous prime is 1152011261. The next prime is 1152011303. The reversal of 1152011280 is 821102511.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2672665 + ... + 2673095.

Almost surely, 2^1152011280 is an apocalyptic number.

1152011280 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 1152011280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149576704).

1152011280 is an abundant number, since it is smaller than the sum of its proper divisors (3147142128).

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

1152011280 is a wasteful number, since it uses less digits than its factorization.

1152011280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 1152011280 is about 33941.2916666411. The cubic root of 1152011280 is about 1048.2999791959.

Adding to 1152011280 its reverse (821102511), we get a palindrome (1973113791).

The spelling of 1152011280 in words is "one billion, one hundred fifty-two million, eleven thousand, two hundred eighty".