1309453128 has 64 divisors (see below), whose sum is σ = 3682324800. Its totient is φ = 436478544.

The previous prime is 1309453091. The next prime is 1309453163. The reversal of 1309453128 is 8213549031.

1309453128 is a `hidden beast` number, since 1 + 30 + 94 + 531 + 2 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1309453092 and 1309453101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19926 + ... + 54917.

It is an arithmetic number, because the mean of its divisors is an integer number (57536325).

Almost surely, 2^1309453128 is an apocalyptic number.

1309453128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1309453128 is an abundant number, since it is smaller than the sum of its proper divisors (2372871672).

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

1309453128 is an frugal number, since it uses more digits than its factorization.

1309453128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74870 (or 74848 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1309453128 is about 36186.3666040126. The cubic root of 1309453128 is about 1094.0319009622.

The spelling of 1309453128 in words is "one billion, three hundred nine million, four hundred fifty-three thousand, one hundred twenty-eight".