378557055 has 12 divisors (see below), whose sum is σ = 656165640. Its totient is φ = 201897072.

The previous prime is 378557051. The next prime is 378557057. The reversal of 378557055 is 550755873.

378557055 is a `hidden beast` number, since 3 + 78 + 5 + 570 + 5 + 5 = 666.

It is not a de Polignac number, because 378557055 - 2² = 378557051 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 8412379 = 378557055 / (3 + 7 + 8 + 5 + 5 + 7 + 0 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 378557055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378557051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4206145 + ... + 4206234.

It is an arithmetic number, because the mean of its divisors is an integer number (54680470).

Almost surely, 2^378557055 is an apocalyptic number.

378557055 is a deficient number, since it is larger than the sum of its proper divisors (277608585).

378557055 is a wasteful number, since it uses less digits than its factorization.

378557055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8412390 (or 8412387 counting only the distinct ones).

The product of its (nonzero) digits is 735000, while the sum is 45.

The square root of 378557055 is about 19456.5427298891. The cubic root of 378557055 is about 723.3976852901.

The spelling of 378557055 in words is "three hundred seventy-eight million, five hundred fifty-seven thousand, fifty-five".