2001238772 has 24 divisors (see below), whose sum is σ = 3772874952. Its totient is φ = 923328000.

The previous prime is 2001238769. The next prime is 2001238777. The reversal of 2001238772 is 2778321002.

It can be written as a sum of positive squares in 4 ways, for example, as 50779876 + 1950458896 = 7126^2 + 44164^2 .

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001238777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213872 + ... + 223032.

It is an arithmetic number, because the mean of its divisors is an integer number (157203123).

Almost surely, 2^2001238772 is an apocalyptic number.

It is an amenable number.

2001238772 is a deficient number, since it is larger than the sum of its proper divisors (1771636180).

2001238772 is a wasteful number, since it uses less digits than its factorization.

2001238772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13379 (or 13377 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 2001238772 is about 44735.2072980555. The cubic root of 2001238772 is about 1260.1811220271.

Adding to 2001238772 its reverse (2778321002), we get a palindrome (4779559774).

The spelling of 2001238772 in words is "two billion, one million, two hundred thirty-eight thousand, seven hundred seventy-two".