2399209428 has 96 divisors (see below), whose sum is σ = 7002390528. Its totient is φ = 621129600.

The previous prime is 2399209427. The next prime is 2399209457. The reversal of 2399209428 is 8249029932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2399209427) 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 31 ways as a sum of consecutive naturals, for example, 288813 + ... + 297003.

It is an arithmetic number, because the mean of its divisors is an integer number (72941568).

Almost surely, 2^2399209428 is an apocalyptic number.

2399209428 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 2399209428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3501195264).

2399209428 is an abundant number, since it is smaller than the sum of its proper divisors (4603181100).

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

2399209428 is a wasteful number, since it uses less digits than its factorization.

2399209428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8533 (or 8531 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 2399209428 is about 48981.7254493959. The cubic root of 2399209428 is about 1338.7188743122.

The spelling of 2399209428 in words is "two billion, three hundred ninety-nine million, two hundred nine thousand, four hundred twenty-eight".