381378865 has 8 divisors (see below), whose sum is σ = 523033920. Its totient is φ = 261516912.

The previous prime is 381378857. The next prime is 381378889. The reversal of 381378865 is 568873183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381378865 - 2³ = 381378857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5448235 + ... + 5448304.

It is an arithmetic number, because the mean of its divisors is an integer number (65379240).

Almost surely, 2^381378865 is an apocalyptic number.

381378865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381378865 is a deficient number, since it is larger than the sum of its proper divisors (141655055).

381378865 is a wasteful number, since it uses less digits than its factorization.

381378865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10896551.

The product of its digits is 967680, while the sum is 49.

The square root of 381378865 is about 19528.9238054738. The cubic root of 381378865 is about 725.1906688367.

The spelling of 381378865 in words is "three hundred eighty-one million, three hundred seventy-eight thousand, eight hundred sixty-five".