2001230406 has 96 divisors (see below), whose sum is σ = 5088365568. Its totient is φ = 556536960.

The previous prime is 2001230393. The next prime is 2001230419. The reversal of 2001230406 is 6040321002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2001230393) and next prime (2001230419).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2334730 + ... + 2335586.

It is an arithmetic number, because the mean of its divisors is an integer number (53003808).

Almost surely, 2^2001230406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001230406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2544182784).

2001230406 is an abundant number, since it is smaller than the sum of its proper divisors (3087135162).

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

2001230406 is a wasteful number, since it uses less digits than its factorization.

2001230406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2001230406 is about 44735.1137921879. The cubic root of 2001230406 is about 1260.1793659997.

Adding to 2001230406 its reverse (6040321002), we get a palindrome (8041551408).

The spelling of 2001230406 in words is "two billion, one million, two hundred thirty thousand, four hundred six".