201201840 has 240 divisors, whose sum is σ = 806600160. Its totient is φ = 45964800.

The previous prime is 201201829. The next prime is 201201841. The reversal of 201201840 is 48102102.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is not an unprimeable number, because it can be changed into a prime (201201841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104890 + ... + 106790.

It is an arithmetic number, because the mean of its divisors is an integer number (3360834).

Almost surely, 2^201201840 is an apocalyptic number.

201201840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201201840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403300080).

201201840 is an abundant number, since it is smaller than the sum of its proper divisors (605398320).

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

201201840 is a wasteful number, since it uses less digits than its factorization.

201201840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 201201840 is about 14184.5634405857. The cubic root of 201201840 is about 585.9726095442.

Adding to 201201840 its reverse (48102102), we get a palindrome (249303942).

The spelling of 201201840 in words is "two hundred one million, two hundred one thousand, eight hundred forty".