3778855 has 4 divisors (see below), whose sum is σ = 4534632. Its totient is φ = 3023080.

The previous prime is 3778837. The next prime is 3778861. The reversal of 3778855 is 5588773.

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

It is not a de Polignac number, because 3778855 - 2⁵ = 3778823 is a prime.

It is a super-2 number, since 2×3778855² = 28559490222050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377881 + ... + 377890.

It is an arithmetic number, because the mean of its divisors is an integer number (1133658).

Almost surely, 2^3778855 is an apocalyptic number.

3778855 is a deficient number, since it is larger than the sum of its proper divisors (755777).

3778855 is an equidigital number, since it uses as much as digits as its factorization.

3778855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755776.

The product of its digits is 235200, while the sum is 43.

The square root of 3778855 is about 1943.9277249939. The cubic root of 3778855 is about 155.7590928805.

The spelling of 3778855 in words is "three million, seven hundred seventy-eight thousand, eight hundred fifty-five".