378030505 has 4 divisors (see below), whose sum is σ = 453636612. Its totient is φ = 302424400.

The previous prime is 378030493. The next prime is 378030511. The reversal of 378030505 is 505030873.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135792409 + 242238096 = 11653^2 + 15564^2 .

It is not a de Polignac number, because 378030505 - 2¹³ = 378022313 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 37803046 + ... + 37803055.

It is an arithmetic number, because the mean of its divisors is an integer number (113409153).

Almost surely, 2^378030505 is an apocalyptic number.

It is an amenable number.

378030505 is a deficient number, since it is larger than the sum of its proper divisors (75606107).

378030505 is an equidigital number, since it uses as much as digits as its factorization.

378030505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75606106.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 378030505 is about 19443.0065833451. The cubic root of 378030505 is about 723.0621288325.

The spelling of 378030505 in words is "three hundred seventy-eight million, thirty thousand, five hundred five".