378162809 has 8 divisors (see below), whose sum is σ = 385883520. Its totient is φ = 370515600.

The previous prime is 378162793. The next prime is 378162817. The reversal of 378162809 is 908261873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 378162809 - 2⁴ = 378162793 is a prime.

It is a super-2 number, since 2×378162809² = 286014220221540962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 378162809.

It is not an unprimeable number, because it can be changed into a prime (378162859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7922 + ... + 28619.

It is an arithmetic number, because the mean of its divisors is an integer number (48235440).

Almost surely, 2^378162809 is an apocalyptic number.

It is an amenable number.

378162809 is a deficient number, since it is larger than the sum of its proper divisors (7720711).

378162809 is a wasteful number, since it uses less digits than its factorization.

378162809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36751.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 378162809 is about 19446.4086401577. The cubic root of 378162809 is about 723.1464719852.

The spelling of 378162809 in words is "three hundred seventy-eight million, one hundred sixty-two thousand, eight hundred nine".