3720385 has 4 divisors (see below), whose sum is σ = 4464468. Its totient is φ = 2976304.

The previous prime is 3720383. The next prime is 3720391. The reversal of 3720385 is 5830273.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1185921 + 2534464 = 1089^2 + 1592^2 .

It is a cyclic number.

It is not a de Polignac number, because 3720385 - 2¹ = 3720383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3720383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372034 + ... + 372043.

It is an arithmetic number, because the mean of its divisors is an integer number (1116117).

Almost surely, 2^3720385 is an apocalyptic number.

It is an amenable number.

3720385 is a deficient number, since it is larger than the sum of its proper divisors (744083).

3720385 is an equidigital number, since it uses as much as digits as its factorization.

3720385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744082.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 3720385 is about 1928.8299562170. The cubic root of 3720385 is about 154.9515630824.

The spelling of 3720385 in words is "three million, seven hundred twenty thousand, three hundred eighty-five".