1305489672 has 48 divisors (see below), whose sum is σ = 3610938240. Its totient is φ = 425903328.

The previous prime is 1305489641. The next prime is 1305489739. The reversal of 1305489672 is 2769845031.

1305489672 is a `hidden beast` number, since 1 + 30 + 548 + 9 + 6 + 72 = 666.

1305489672 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

1305489672 is strictly pandigital in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189508 + ... + 196275.

It is an arithmetic number, because the mean of its divisors is an integer number (75227880).

It is a 1-persistent number, because it is pandigital, but 2⋅1305489672 = 2610979344 is not.

Almost surely, 2^1305489672 is an apocalyptic number.

1305489672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305489672 is an abundant number, since it is smaller than the sum of its proper divisors (2305448568).

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

1305489672 is a wasteful number, since it uses less digits than its factorization.

1305489672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385842 (or 385835 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1305489672 is about 36131.5606084210. The cubic root of 1305489672 is about 1092.9269792541.

The spelling of 1305489672 in words is "one billion, three hundred five million, four hundred eighty-nine thousand, six hundred seventy-two".