378189045 has 54 divisors (see below), whose sum is σ = 713029122. Its totient is φ = 185350464.

The previous prime is 378189041. The next prime is 378189047. The reversal of 378189045 is 540981873.

It can be written as a sum of positive squares in 3 ways, for example, as 1790244 + 376398801 = 1338^2 + 19401^2 .

It is not a de Polignac number, because 378189045 - 2² = 378189041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378189041) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1695804 + ... + 1696026.

It is an arithmetic number, because the mean of its divisors is an integer number (13204243).

Almost surely, 2^378189045 is an apocalyptic number.

It is an amenable number.

378189045 is a deficient number, since it is larger than the sum of its proper divisors (334840077).

378189045 is a wasteful number, since it uses less digits than its factorization.

378189045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 378189045 is about 19447.0832003157. The cubic root of 378189045 is about 723.1631949694.

Multiplying 378189045 by its sum of digits (45), we get a square (17018507025 = 130455²).

378189045 divided by its sum of digits (45) gives a square (8404201 = 2899²).

The spelling of 378189045 in words is "three hundred seventy-eight million, one hundred eighty-nine thousand, forty-five".