381720585 has 16 divisors (see below), whose sum is σ = 612008640. Its totient is φ = 203165760.

The previous prime is 381720557. The next prime is 381720607. The reversal of 381720585 is 585027183.

It is not a de Polignac number, because 381720585 - 2⁵ = 381720553 is a prime.

It is a Curzon 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, 18550 + ... + 33279.

It is an arithmetic number, because the mean of its divisors is an integer number (38250540).

Almost surely, 2^381720585 is an apocalyptic number.

It is an amenable number.

381720585 is a deficient number, since it is larger than the sum of its proper divisors (230288055).

381720585 is a wasteful number, since it uses less digits than its factorization.

381720585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52328.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 381720585 is about 19537.6709205575. The cubic root of 381720585 is about 725.4071973343.

The spelling of 381720585 in words is "three hundred eighty-one million, seven hundred twenty thousand, five hundred eighty-five".