378128390 has 32 divisors (see below), whose sum is σ = 726831360. Its totient is φ = 141321600.

The previous prime is 378128351. The next prime is 378128423. The reversal of 378128390 is 93821873.

378128390 = T₇₀₉₃ + T₇₀₉₄ + ... + T₇₁₀₇.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12041 + ... + 30020.

It is an arithmetic number, because the mean of its divisors is an integer number (22713480).

Almost surely, 2^378128390 is an apocalyptic number.

378128390 is a deficient number, since it is larger than the sum of its proper divisors (348702970).

378128390 is a wasteful number, since it uses less digits than its factorization.

378128390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42128.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 378128390 is about 19445.5236494161. The cubic root of 378128390 is about 723.1245319345.

The spelling of 378128390 in words is "three hundred seventy-eight million, one hundred twenty-eight thousand, three hundred ninety".