201730140 has 36 divisors (see below), whose sum is σ = 611915304. Its totient is φ = 53794656.

The previous prime is 201730129. The next prime is 201730147. The reversal of 201730140 is 41037102.

201730140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201730147) 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, 560182 + ... + 560541.

Almost surely, 2^201730140 is an apocalyptic number.

201730140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201730140 is an abundant number, since it is smaller than the sum of its proper divisors (410185164).

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

201730140 is a wasteful number, since it uses less digits than its factorization.

201730140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120738 (or 1120733 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 201730140 is about 14203.1735890258. The cubic root of 201730140 is about 586.4850282785.

Adding to 201730140 its reverse (41037102), we get a palindrome (242767242).

The spelling of 201730140 in words is "two hundred one million, seven hundred thirty thousand, one hundred forty".