1149312280 has 32 divisors (see below), whose sum is σ = 2722057200. Its totient is φ = 435528576.

The previous prime is 1149312239. The next prime is 1149312301. The reversal of 1149312280 is 822139411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755367 + ... + 756886.

Almost surely, 2^1149312280 is an apocalyptic number.

1149312280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1149312280 is an abundant number, since it is smaller than the sum of its proper divisors (1572744920).

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

1149312280 is a wasteful number, since it uses less digits than its factorization.

1149312280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512283 (or 1512279 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1149312280 is about 33901.5085210083. The cubic root of 1149312280 is about 1047.4806660022.

The spelling of 1149312280 in words is "one billion, one hundred forty-nine million, three hundred twelve thousand, two hundred eighty".