2609998398 has 48 divisors (see below), whose sum is σ = 6474630240. Its totient is φ = 744355008.

The previous prime is 2609998397. The next prime is 2609998421. The reversal of 2609998398 is 8938999062.

It is a super-3 number, since 3×2609998398³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609998397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51588 + ... + 88776.

It is an arithmetic number, because the mean of its divisors is an integer number (134888130).

Almost surely, 2^2609998398 is an apocalyptic number.

2609998398 is an abundant number, since it is smaller than the sum of its proper divisors (3864631842).

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

2609998398 is a wasteful number, since it uses less digits than its factorization.

2609998398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37761 (or 37758 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 63.

The square root of 2609998398 is about 51088.1434189969. The cubic root of 2609998398 is about 1376.8292388594.

The spelling of 2609998398 in words is "two billion, six hundred nine million, nine hundred ninety-eight thousand, three hundred ninety-eight".