309716052 has 12 divisors (see below), whose sum is σ = 722670816. Its totient is φ = 103238680.

The previous prime is 309716051. The next prime is 309716059. The reversal of 309716052 is 250617903.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309716051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12904824 + ... + 12904847.

It is an arithmetic number, because the mean of its divisors is an integer number (60222568).

Almost surely, 2^309716052 is an apocalyptic number.

It is an amenable number.

309716052 is an abundant number, since it is smaller than the sum of its proper divisors (412954764).

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

309716052 is a wasteful number, since it uses less digits than its factorization.

309716052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25809678 (or 25809676 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 309716052 is about 17598.7514329852. The cubic root of 309716052 is about 676.5832442907.

The spelling of 309716052 in words is "three hundred nine million, seven hundred sixteen thousand, fifty-two".