201720038 has 32 divisors (see below), whose sum is σ = 339655680. Its totient is φ = 89218080.

The previous prime is 201719989. The next prime is 201720047. The reversal of 201720038 is 830027102.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201719995 and 201720022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85073 + ... + 87411.

It is an arithmetic number, because the mean of its divisors is an integer number (10614240).

Almost surely, 2^201720038 is an apocalyptic number.

201720038 is a deficient number, since it is larger than the sum of its proper divisors (137935642).

201720038 is a wasteful number, since it uses less digits than its factorization.

201720038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 201720038 is about 14202.8179598275. The cubic root of 201720038 is about 586.4752383504.

The spelling of 201720038 in words is "two hundred one million, seven hundred twenty thousand, thirty-eight".