201730920 has 32 divisors (see below), whose sum is σ = 605193120. Its totient is φ = 53794880.

The previous prime is 201730897. The next prime is 201730927. The reversal of 201730920 is 29037102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (201730927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840426 + ... + 840665.

It is an arithmetic number, because the mean of its divisors is an integer number (18912285).

Almost surely, 2^201730920 is an apocalyptic number.

201730920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201730920 is an abundant number, since it is smaller than the sum of its proper divisors (403462200).

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

201730920 is a wasteful number, since it uses less digits than its factorization.

201730920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681105 (or 1681101 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 201730920 is about 14203.2010476512. The cubic root of 201730920 is about 586.4857841690.

The spelling of 201730920 in words is "two hundred one million, seven hundred thirty thousand, nine hundred twenty".