1209984480 has 144 divisors (see below), whose sum is σ = 4282138224. Its totient is φ = 322652160.

The previous prime is 1209984473. The next prime is 1209984493. The reversal of 1209984480 is 844899021.

1209984480 is a `hidden beast` number, since 1 + 2 + 0 + 99 + 84 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 23320 + ... + 54440.

It is an arithmetic number, because the mean of its divisors is an integer number (29737071).

Almost surely, 2^1209984480 is an apocalyptic number.

1209984480 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 1209984480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2141069112).

1209984480 is an abundant number, since it is smaller than the sum of its proper divisors (3072153744).

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

1209984480 is an equidigital number, since it uses as much as digits as its factorization.

1209984480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31151 (or 31131 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1209984480 is about 34784.8311768219. The cubic root of 1209984480 is about 1065.5976807838.

The spelling of 1209984480 in words is "one billion, two hundred nine million, nine hundred eighty-four thousand, four hundred eighty".