2001724398 has 72 divisors (see below), whose sum is σ = 4655868672. Its totient is φ = 621361152.

The previous prime is 2001724393. The next prime is 2001724429. The reversal of 2001724398 is 8934271002.

2001724398 is a `hidden beast` number, since 200 + 17 + 2 + 439 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001724393) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 502611 + ... + 506577.

Almost surely, 2^2001724398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001724398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2327934336).

2001724398 is an abundant number, since it is smaller than the sum of its proper divisors (2654144274).

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

2001724398 is a wasteful number, since it uses less digits than its factorization.

2001724398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106 (or 4086 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2001724398 is about 44740.6347518673. The cubic root of 2001724398 is about 1260.2830467668.

The spelling of 2001724398 in words is "two billion, one million, seven hundred twenty-four thousand, three hundred ninety-eight".