378811 has 4 divisors (see below), whose sum is σ = 401112. Its totient is φ = 356512.

The previous prime is 378809. The next prime is 378817. The reversal of 378811 is 118873.

378811 = T₃₀ + T₃₁ + ... + T₁₃₁.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 378811 - 2¹ = 378809 is a prime.

It is a Duffinian number.

378811 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 378811.

It is not an unprimeable number, because it can be changed into a prime (378817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11125 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (100278).

2³⁷⁸⁸¹¹ is an apocalyptic number.

378811 is a deficient number, since it is larger than the sum of its proper divisors (22301).

378811 is a wasteful number, since it uses less digits than its factorization.

378811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22300.

The product of its digits is 1344, while the sum is 28.

The square root of 378811 is about 615.4762383716. The cubic root of 378811 is about 72.3559406542.

The spelling of 378811 in words is "three hundred seventy-eight thousand, eight hundred eleven".