1149820280 has 96 divisors (see below), whose sum is σ = 3027767040. Its totient is φ = 391829760.

The previous prime is 1149820201. The next prime is 1149820297. The reversal of 1149820280 is 820289411.

It is a Cunningham number, because it is equal to 33909²-1.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1149820280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337385 + ... + 340775.

It is an arithmetic number, because the mean of its divisors is an integer number (31539240).

Almost surely, 2^1149820280 is an apocalyptic number.

1149820280 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 1149820280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1513883520).

1149820280 is an abundant number, since it is smaller than the sum of its proper divisors (1877946760).

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

1149820280 is a wasteful number, since it uses less digits than its factorization.

1149820280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589 (or 3578 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1149820280 is about 33908.9999852547. Note that the first 4 decimals coincide. The cubic root of 1149820280 is about 1047.6349732946.

The spelling of 1149820280 in words is "one billion, one hundred forty-nine million, eight hundred twenty thousand, two hundred eighty".