201856140 has 36 divisors (see below), whose sum is σ = 612297504. Its totient is φ = 53828256.

The previous prime is 201856121. The next prime is 201856141. The reversal of 201856140 is 41658102.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (201856141) 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, 560532 + ... + 560891.

It is an arithmetic number, because the mean of its divisors is an integer number (17008264).

Almost surely, 2^201856140 is an apocalyptic number.

201856140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201856140 is an abundant number, since it is smaller than the sum of its proper divisors (410441364).

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

201856140 is a wasteful number, since it uses less digits than its factorization.

201856140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121438 (or 1121433 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 201856140 is about 14207.6085250122. The cubic root of 201856140 is about 586.6071084224.

The spelling of 201856140 in words is "two hundred one million, eight hundred fifty-six thousand, one hundred forty".