378905438 has 4 divisors (see below), whose sum is σ = 568358160. Its totient is φ = 189452718.

The previous prime is 378905407. The next prime is 378905441. The reversal of 378905438 is 834509873.

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

It is a junction number, because it is equal to n+sod(n) for n = 378905392 and 378905401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94726358 + ... + 94726361.

It is an arithmetic number, because the mean of its divisors is an integer number (142089540).

Almost surely, 2^378905438 is an apocalyptic number.

378905438 is a deficient number, since it is larger than the sum of its proper divisors (189452722).

378905438 is a wasteful number, since it uses less digits than its factorization.

378905438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189452721.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 378905438 is about 19465.4935205866. The cubic root of 378905438 is about 723.6195295990.

The spelling of 378905438 in words is "three hundred seventy-eight million, nine hundred five thousand, four hundred thirty-eight".