1209530880 has 400 divisors, whose sum is σ = 4575019680. Its totient is φ = 304570368.

The previous prime is 1209530867. The next prime is 1209530887. The reversal of 1209530880 is 880359021.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1209530887) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3939687 + ... + 3939993.

Almost surely, 2^1209530880 is an apocalyptic number.

1209530880 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 1209530880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2287509840).

1209530880 is an abundant number, since it is smaller than the sum of its proper divisors (3365488800).

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

1209530880 is an equidigital number, since it uses as much as digits as its factorization.

1209530880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1209530880 is about 34778.3104822532. The cubic root of 1209530880 is about 1065.4645067559.

1209530880 divided by its product of nonzero digits (17280) gives a palindrome (69996).

The spelling of 1209530880 in words is "one billion, two hundred nine million, five hundred thirty thousand, eight hundred eighty".