3729805 has 8 divisors (see below), whose sum is σ = 4493592. Its totient is φ = 2971968.

The previous prime is 3729799. The next prime is 3729809. The reversal of 3729805 is 5089273.

It can be written as a sum of positive squares in 4 ways, for example, as 35721 + 3694084 = 189^2 + 1922^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3729805 - 2³ = 3729797 is a prime.

It is a super-2 number, since 2×3729805² = 27822890676050, which contains 22 as substring.

It is a Duffinian number.

3729805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3729809) 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, 39 + ... + 2731.

It is an arithmetic number, because the mean of its divisors is an integer number (561699).

Almost surely, 2^3729805 is an apocalyptic number.

It is an amenable number.

3729805 is a deficient number, since it is larger than the sum of its proper divisors (763787).

3729805 is a wasteful number, since it uses less digits than its factorization.

3729805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 3729805 is about 1931.2703073366. The cubic root of 3729805 is about 155.0822317736.

The spelling of 3729805 in words is "three million, seven hundred twenty-nine thousand, eight hundred five".