378138123 has 48 divisors (see below), whose sum is σ = 638741376. Its totient is φ = 213016320.

The previous prime is 378138109. The next prime is 378138143. The reversal of 378138123 is 321831873.

It is not a de Polignac number, because 378138123 - 2¹² = 378134027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (378138143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138336 + ... + 141042.

It is an arithmetic number, because the mean of its divisors is an integer number (13307112).

Almost surely, 2^378138123 is an apocalyptic number.

378138123 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

378138123 is a deficient number, since it is larger than the sum of its proper divisors (260603253).

378138123 is a wasteful number, since it uses less digits than its factorization.

378138123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824 (or 2821 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 378138123 is about 19445.7739110584. The cubic root of 378138123 is about 723.1307362740.

Adding to 378138123 its reverse (321831873), we get a palindrome (699969996).

The spelling of 378138123 in words is "three hundred seventy-eight million, one hundred thirty-eight thousand, one hundred twenty-three".