201789630 has 96 divisors (see below), whose sum is σ = 621863424. Its totient is φ = 46119456.

The previous prime is 201789589. The next prime is 201789631. The reversal of 201789630 is 36987102.

201789630 is a `hidden beast` number, since 2 + 0 + 17 + 8 + 9 + 630 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201789631) 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, 11079 + ... + 22941.

It is an arithmetic number, because the mean of its divisors is an integer number (6477744).

Almost surely, 2^201789630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201789630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310931712).

201789630 is an abundant number, since it is smaller than the sum of its proper divisors (420073794).

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

201789630 is a wasteful number, since it uses less digits than its factorization.

201789630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892 (or 11880 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 201789630 is about 14205.2676849118. The cubic root of 201789630 is about 586.5426738790.

The spelling of 201789630 in words is "two hundred one million, seven hundred eighty-nine thousand, six hundred thirty".