309877386 has 96 divisors (see below), whose sum is σ = 774748800. Its totient is φ = 80900352.

The previous prime is 309877361. The next prime is 309877387. The reversal of 309877386 is 683778903.

309877386 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (309877387) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1057456 + ... + 1057748.

It is an arithmetic number, because the mean of its divisors is an integer number (8070300).

Almost surely, 2^309877386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309877386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387374400).

309877386 is an abundant number, since it is smaller than the sum of its proper divisors (464871414).

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

309877386 is a wasteful number, since it uses less digits than its factorization.

309877386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 309877386 is about 17603.3345136653. The cubic root of 309877386 is about 676.7007034197.

The spelling of 309877386 in words is "three hundred nine million, eight hundred seventy-seven thousand, three hundred eighty-six".