201128237940 has 144 divisors (see below), whose sum is σ = 683697232512. Its totient is φ = 43267897344.

The previous prime is 201128237909. The next prime is 201128237941. The reversal of 201128237940 is 49732821102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201128237941) 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, 707127 + ... + 949886.

It is an arithmetic number, because the mean of its divisors is an integer number (4747897448).

Almost surely, 2^201128237940 is an apocalyptic number.

201128237940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201128237940 is an abundant number, since it is smaller than the sum of its proper divisors (482568994572).

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

201128237940 is a wasteful number, since it uses less digits than its factorization.

201128237940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657066 (or 1657047 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 201128237940 in words is "two hundred one billion, one hundred twenty-eight million, two hundred thirty-seven thousand, nine hundred forty".