2309769728 has 160 divisors (see below), whose sum is σ = 5550716160. Its totient is φ = 939294720.

The previous prime is 2309769691. The next prime is 2309769773. The reversal of 2309769728 is 8279679032.

It is a self number, because there is not a number n which added to its sum of digits gives 2309769728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7379300 + ... + 7379612.

It is an arithmetic number, because the mean of its divisors is an integer number (34691976).

Almost surely, 2^2309769728 is an apocalyptic number.

2309769728 is a gapful number since it is divisible by the number (28) 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 2309769728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2775358080).

2309769728 is an abundant number, since it is smaller than the sum of its proper divisors (3240946432).

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

2309769728 is an equidigital number, since it uses as much as digits as its factorization.

2309769728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 2309769728 is about 48060.0637535990. The cubic root of 2309769728 is about 1321.8724818124.

The spelling of 2309769728 in words is "two billion, three hundred nine million, seven hundred sixty-nine thousand, seven hundred twenty-eight".