3780205 has 32 divisors (see below), whose sum is σ = 5660928. Its totient is φ = 2380800.

The previous prime is 3780199. The next prime is 3780247. The reversal of 3780205 is 5020873.

It is not a de Polignac number, because 3780205 - 2¹⁷ = 3649133 is a prime.

3780205 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3780205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12000 + ... + 12310.

It is an arithmetic number, because the mean of its divisors is an integer number (176904).

Almost surely, 2^3780205 is an apocalyptic number.

It is an amenable number.

3780205 is a deficient number, since it is larger than the sum of its proper divisors (1880723).

3780205 is a wasteful number, since it uses less digits than its factorization.

3780205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 3780205 is about 1944.2749291188. The cubic root of 3780205 is about 155.7776390398. Note that the first 3 decimals are identical.

The spelling of 3780205 in words is "three million, seven hundred eighty thousand, two hundred five".