1304190720 has 432 divisors, whose sum is σ = 5356915200. Its totient is φ = 297603072.

The previous prime is 1304190709. The next prime is 1304190721. The reversal of 1304190720 is 270914031.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304190721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2176981 + ... + 2177579.

Almost surely, 2^1304190720 is an apocalyptic number.

1304190720 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 1304190720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678457600).

1304190720 is an abundant number, since it is smaller than the sum of its proper divisors (4052724480).

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

1304190720 is an frugal number, since it uses more digits than its factorization.

1304190720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1304190720 is about 36113.5808249473. The cubic root of 1304190720 is about 1092.5643743693.

The spelling of 1304190720 in words is "one billion, three hundred four million, one hundred ninety thousand, seven hundred twenty".