378817255 has 4 divisors (see below), whose sum is σ = 454580712. Its totient is φ = 303053800.

The previous prime is 378817249. The next prime is 378817261. The reversal of 378817255 is 552718873.

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

It is an interprime number because it is at equal distance from previous prime (378817249) and next prime (378817261).

It is not a de Polignac number, because 378817255 - 2⁵ = 378817223 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, 37881721 + ... + 37881730.

It is an arithmetic number, because the mean of its divisors is an integer number (113645178).

Almost surely, 2^378817255 is an apocalyptic number.

378817255 is a deficient number, since it is larger than the sum of its proper divisors (75763457).

378817255 is an equidigital number, since it uses as much as digits as its factorization.

378817255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75763456.

The product of its digits is 470400, while the sum is 46.

The square root of 378817255 is about 19463.2282779605. The cubic root of 378817255 is about 723.5633890378.

The spelling of 378817255 in words is "three hundred seventy-eight million, eight hundred seventeen thousand, two hundred fifty-five".