2398158840 has 512 divisors, whose sum is σ = 9405849600. Its totient is φ = 474839040.

The previous prime is 2398158773. The next prime is 2398158859. The reversal of 2398158840 is 488518932.

It is a Cunningham number, because it is equal to 48971²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 2398158840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28893439 + ... + 28893521.

It is an arithmetic number, because the mean of its divisors is an integer number (18370800).

Almost surely, 2^2398158840 is an apocalyptic number.

2398158840 is a gapful number since it is divisible by the number (20) 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 2398158840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4702924800).

2398158840 is an abundant number, since it is smaller than the sum of its proper divisors (7007690760).

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

2398158840 is a wasteful number, since it uses less digits than its factorization.

2398158840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 2398158840 is about 48970.9999897899. Note that the first 4 decimals coincide. The cubic root of 2398158840 is about 1338.5234422521.

The spelling of 2398158840 in words is "two billion, three hundred ninety-eight million, one hundred fifty-eight thousand, eight hundred forty".