3690805 has 8 divisors (see below), whose sum is σ = 4501944. Its totient is φ = 2904000.

The previous prime is 3690803. The next prime is 3690821. The reversal of 3690805 is 5080963.

It can be written as a sum of positive squares in 4 ways, for example, as 568516 + 3122289 = 754^2 + 1767^2 .

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

It is not a de Polignac number, because 3690805 - 2¹ = 3690803 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3690803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5746 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (562743).

Almost surely, 2^3690805 is an apocalyptic number.

It is an amenable number.

3690805 is a deficient number, since it is larger than the sum of its proper divisors (811139).

3690805 is a wasteful number, since it uses less digits than its factorization.

3690805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12167.

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

The square root of 3690805 is about 1921.1467929338. The cubic root of 3690805 is about 154.5398074376.

The spelling of 3690805 in words is "three million, six hundred ninety thousand, eight hundred five".