1204721280 has 192 divisors, whose sum is σ = 4754505600. Its totient is φ = 275355648.

The previous prime is 1204721267. The next prime is 1204721291. The reversal of 1204721280 is 821274021.

It is a tau number, because it is divible by the number of its divisors (192).

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, 25381 + ... + 55259.

It is an arithmetic number, because the mean of its divisors is an integer number (24763050).

Almost surely, 2^1204721280 is an apocalyptic number.

1204721280 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 1204721280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2377252800).

1204721280 is an abundant number, since it is smaller than the sum of its proper divisors (3549784320).

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

1204721280 is a wasteful number, since it uses less digits than its factorization.

1204721280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29911 (or 29896 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1204721280 is about 34709.0950616694. The cubic root of 1204721280 is about 1064.0503867446.

The spelling of 1204721280 in words is "one billion, two hundred four million, seven hundred twenty-one thousand, two hundred eighty".