2398998840 has 96 divisors (see below), whose sum is σ = 8372036880. Its totient is φ = 548341248.

The previous prime is 2398998821. The next prime is 2398998841. The reversal of 2398998840 is 488998932.

It is a happy number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2398998841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198117 + ... + 209876.

Almost surely, 2^2398998840 is an apocalyptic number.

2398998840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2398998840 is an abundant number, since it is smaller than the sum of its proper divisors (5973038040).

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

2398998840 is a wasteful number, since it uses less digits than its factorization.

2398998840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408021 (or 408010 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 60.

The square root of 2398998840 is about 48979.5757433647. The cubic root of 2398998840 is about 1338.6797049681.

The spelling of 2398998840 in words is "two billion, three hundred ninety-eight million, nine hundred ninety-eight thousand, eight hundred forty".