1309645152 has 96 divisors (see below), whose sum is σ = 3908741760. Its totient is φ = 426384000.

The previous prime is 1309645151. The next prime is 1309645157. The reversal of 1309645152 is 2515469031.

1309645152 is a `hidden beast` number, since 1 + 3 + 0 + 9 + 645 + 1 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309645151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19527 + ... + 54777.

It is an arithmetic number, because the mean of its divisors is an integer number (40716060).

Almost surely, 2^1309645152 is an apocalyptic number.

1309645152 is a gapful number since it is divisible by the number (12) 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 1309645152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1954370880).

1309645152 is an abundant number, since it is smaller than the sum of its proper divisors (2599096608).

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

1309645152 is a wasteful number, since it uses less digits than its factorization.

1309645152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35313 (or 35299 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1309645152 is about 36189.0197711958. The cubic root of 1309645152 is about 1094.0853762411.

The spelling of 1309645152 in words is "one billion, three hundred nine million, six hundred forty-five thousand, one hundred fifty-two".