378665746 has 32 divisors (see below), whose sum is σ = 593752320. Its totient is φ = 180994176.

The previous prime is 378665743. The next prime is 378665747. The reversal of 378665746 is 647566873.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 378665693 and 378665702.

It is not an unprimeable number, because it can be changed into a prime (378665741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953620 + ... + 954016.

It is an arithmetic number, because the mean of its divisors is an integer number (18554760).

Almost surely, 2^378665746 is an apocalyptic number.

378665746 is a deficient number, since it is larger than the sum of its proper divisors (215086574).

378665746 is a wasteful number, since it uses less digits than its factorization.

378665746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658.

The product of its digits is 5080320, while the sum is 52.

The square root of 378665746 is about 19459.3357029473. The cubic root of 378665746 is about 723.4669124540.

The spelling of 378665746 in words is "three hundred seventy-eight million, six hundred sixty-five thousand, seven hundred forty-six".