2238278394 has 32 divisors (see below), whose sum is σ = 5140546560. Its totient is φ = 642567600.

The previous prime is 2238278387. The next prime is 2238278401. The reversal of 2238278394 is 4938728322.

It is an interprime number because it is at equal distance from previous prime (2238278387) and next prime (2238278401).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891202 + ... + 893709.

It is an arithmetic number, because the mean of its divisors is an integer number (160642080).

Almost surely, 2^2238278394 is an apocalyptic number.

2238278394 is an abundant number, since it is smaller than the sum of its proper divisors (2902268166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2238278394 is a wasteful number, since it uses less digits than its factorization.

2238278394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784946.

The product of its digits is 1161216, while the sum is 48.

The square root of 2238278394 is about 47310.4469858402. The cubic root of 2238278394 is about 1308.0912305790.

It can be divided in two parts, 223827 and 8394, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 2238278394 in words is "two billion, two hundred thirty-eight million, two hundred seventy-eight thousand, three hundred ninety-four".