201912840 has 48 divisors (see below), whose sum is σ = 656217900. Its totient is φ = 53843328.

The previous prime is 201912839. The next prime is 201912847. The reversal of 201912840 is 48219102.

It can be written as a sum of positive squares in 2 ways, for example, as 171243396 + 30669444 = 13086^2 + 5538^2 .

It is not an unprimeable number, because it can be changed into a prime (201912847) 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, 280075 + ... + 280794.

Almost surely, 2^201912840 is an apocalyptic number.

201912840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201912840 is an abundant number, since it is smaller than the sum of its proper divisors (454305060).

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

201912840 is a wasteful number, since it uses less digits than its factorization.

201912840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560886 (or 560879 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 201912840 is about 14209.6037946172. The cubic root of 201912840 is about 586.6620279133.

The spelling of 201912840 in words is "two hundred one million, nine hundred twelve thousand, eight hundred forty".