309148452 has 54 divisors (see below), whose sum is σ = 793710918. Its totient is φ = 101458368.

The previous prime is 309148421. The next prime is 309148453. The reversal of 309148452 is 254841903.

309148452 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 298805796 + 10342656 = 17286^2 + 3216^2 .

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

It is not an unprimeable number, because it can be changed into a prime (309148453) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 160648 + ... + 162560.

Almost surely, 2^309148452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309148452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396855459).

309148452 is an abundant number, since it is smaller than the sum of its proper divisors (484562466).

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

309148452 is a wasteful number, since it uses less digits than its factorization.

309148452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 1985 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 309148452 is about 17582.6178938177. The cubic root of 309148452 is about 676.1696789380.

The spelling of 309148452 in words is "three hundred nine million, one hundred forty-eight thousand, four hundred fifty-two".