3779865 has 56 divisors (see below), whose sum is σ = 7318728. Its totient is φ = 1866240.

The previous prime is 3779863. The next prime is 3779873. The reversal of 3779865 is 5689773.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104976 + 3674889 = 324^2 + 1917^2 .

It is not a de Polignac number, because 3779865 - 2¹ = 3779863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a d-powerful number, because it can be written as 3¹³ + 7 + 7⁴ + 9² + 8⁷ + 6⁵ + 5⁷ .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3779865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3779863) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 61935 + ... + 61995.

Almost surely, 2^3779865 is an apocalyptic number.

It is an amenable number.

3779865 is a deficient number, since it is larger than the sum of its proper divisors (3538863).

3779865 is an equidigital number, since it uses as much as digits as its factorization.

3779865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 86 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 3779865 is about 1944.1874909586. The cubic root of 3779865 is about 155.7729685713.

The spelling of 3779865 in words is "three million, seven hundred seventy-nine thousand, eight hundred sixty-five".