201838540 has 12 divisors (see below), whose sum is σ = 423860976. Its totient is φ = 80735408.

The previous prime is 201838537. The next prime is 201838541. The reversal of 201838540 is 45838102.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (201838541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5045944 + ... + 5045983.

It is an arithmetic number, because the mean of its divisors is an integer number (35321748).

Almost surely, 2^201838540 is an apocalyptic number.

201838540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201838540 is an abundant number, since it is smaller than the sum of its proper divisors (222022436).

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

201838540 is a wasteful number, since it uses less digits than its factorization.

201838540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10091936 (or 10091934 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 201838540 is about 14206.9891250750. The cubic root of 201838540 is about 586.5900590109.

The spelling of 201838540 in words is "two hundred one million, eight hundred thirty-eight thousand, five hundred forty".