378212885 has 4 divisors (see below), whose sum is σ = 453855468. Its totient is φ = 302570304.

The previous prime is 378212869. The next prime is 378212899. The reversal of 378212885 is 588212873.

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 255424324 + 122788561 = 15982^2 + 11081^2 .

It is a cyclic number.

It is not a de Polignac number, because 378212885 - 2⁴ = 378212869 is a prime.

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, 37821284 + ... + 37821293.

It is an arithmetic number, because the mean of its divisors is an integer number (113463867).

Almost surely, 2^378212885 is an apocalyptic number.

It is an amenable number.

378212885 is a deficient number, since it is larger than the sum of its proper divisors (75642583).

378212885 is an equidigital number, since it uses as much as digits as its factorization.

378212885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75642582.

The product of its digits is 215040, while the sum is 44.

The square root of 378212885 is about 19447.6961360466. The cubic root of 378212885 is about 723.1783900582.

The spelling of 378212885 in words is "three hundred seventy-eight million, two hundred twelve thousand, eight hundred eighty-five".