2591233398 has 144 divisors (see below), whose sum is σ = 6520934160. Its totient is φ = 740653056.

The previous prime is 2591233387. The next prime is 2591233409. The reversal of 2591233398 is 8933321952.

2591233398 is a `hidden beast` number, since 2 + 591 + 23 + 3 + 39 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (2591233387) and next prime (2591233409).

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 4602265 + ... + 4602827.

It is an arithmetic number, because the mean of its divisors is an integer number (45284265).

Almost surely, 2^2591233398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2591233398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3260467080).

2591233398 is an abundant number, since it is smaller than the sum of its proper divisors (3929700762).

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

2591233398 is a wasteful number, since it uses less digits than its factorization.

2591233398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 687 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 2591233398 is about 50904.1589460036. The cubic root of 2591233398 is about 1373.5216548364.

The spelling of 2591233398 in words is "two billion, five hundred ninety-one million, two hundred thirty-three thousand, three hundred ninety-eight".