6380905 has 8 divisors (see below), whose sum is σ = 7782984. Its totient is φ = 5020800.

The previous prime is 6380897. The next prime is 6380923. The reversal of 6380905 is 5090836.

It can be written as a sum of positive squares in 4 ways, for example, as 110889 + 6270016 = 333^2 + 2504^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6380905 - 2³ = 6380897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10156 + ... + 10765.

It is an arithmetic number, because the mean of its divisors is an integer number (972873).

Almost surely, 2^6380905 is an apocalyptic number.

It is an amenable number.

6380905 is a deficient number, since it is larger than the sum of its proper divisors (1402079).

6380905 is a wasteful number, since it uses less digits than its factorization.

6380905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20987.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 6380905 is about 2526.0453281760. The cubic root of 6380905 is about 185.4787211953.

The spelling of 6380905 in words is "six million, three hundred eighty thousand, nine hundred five".