201898620 has 216 divisors, whose sum is σ = 777552048. Its totient is φ = 41932800.

The previous prime is 201898607. The next prime is 201898657. The reversal of 201898620 is 26898102.

201898620 is a `hidden beast` number, since 20 + 1 + 8 + 9 + 8 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 95980 + ... + 98060.

It is an arithmetic number, because the mean of its divisors is an integer number (3599778).

Almost surely, 2^201898620 is an apocalyptic number.

201898620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201898620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388776024).

201898620 is an abundant number, since it is smaller than the sum of its proper divisors (575653428).

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

201898620 is a wasteful number, since it uses less digits than its factorization.

201898620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 201898620 is about 14209.1034199910. The cubic root of 201898620 is about 586.6482554197.

The spelling of 201898620 in words is "two hundred one million, eight hundred ninety-eight thousand, six hundred twenty".