3778905 has 16 divisors (see below), whose sum is σ = 6511680. Its totient is φ = 1860288.

The previous prime is 3778897. The next prime is 3778909. The reversal of 3778905 is 5098773.

It is not a de Polignac number, because 3778905 - 2³ = 3778897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a d-powerful number, because it can be written as 3¹³ + 7³ + 7⁴ + 8⁷ + 9⁴ + 0 + 5⁷ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3778909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9495 + ... + 9884.

It is an arithmetic number, because the mean of its divisors is an integer number (406980).

Almost surely, 2^3778905 is an apocalyptic number.

It is an amenable number.

3778905 is a deficient number, since it is larger than the sum of its proper divisors (2732775).

3778905 is a wasteful number, since it uses less digits than its factorization.

3778905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19400.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 3778905 is about 1943.9405855118. The cubic root of 3778905 is about 155.7597798541.

The spelling of 3778905 in words is "three million, seven hundred seventy-eight thousand, nine hundred five".