201240400 has 60 divisors (see below), whose sum is σ = 508945600. Its totient is φ = 76256640.

The previous prime is 201240383. The next prime is 201240401. The reversal of 201240400 is 4042102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201240401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5640 + ... + 20839.

Almost surely, 2^201240400 is an apocalyptic number.

201240400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201240400 is an abundant number, since it is smaller than the sum of its proper divisors (307705200).

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

201240400 is a wasteful number, since it uses less digits than its factorization.

201240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26516 (or 26505 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 201240400 is about 14185.9225995351. The cubic root of 201240400 is about 586.0100407137.

Adding to 201240400 its reverse (4042102), we get a palindrome (205282502).

The spelling of 201240400 in words is "two hundred one million, two hundred forty thousand, four hundred".