381367278 has 80 divisors (see below), whose sum is σ = 938805120. Its totient is φ = 115174224.

The previous prime is 381367267. The next prime is 381367289. The reversal of 381367278 is 872763183.

381367278 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (381367267) and next prime (381367289).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 68101 + ... + 73487.

It is an arithmetic number, because the mean of its divisors is an integer number (11735064).

Almost surely, 2^381367278 is an apocalyptic number.

381367278 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381367278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469402560).

381367278 is an abundant number, since it is smaller than the sum of its proper divisors (557437842).

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

381367278 is a wasteful number, since it uses less digits than its factorization.

381367278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5443 (or 5434 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 381367278 is about 19528.6271406876. The cubic root of 381367278 is about 725.1833245480.

The spelling of 381367278 in words is "three hundred eighty-one million, three hundred sixty-seven thousand, two hundred seventy-eight".