378039911 has 4 divisors (see below), whose sum is σ = 391075800. Its totient is φ = 365004024.

The previous prime is 378039901. The next prime is 378039919. The reversal of 378039911 is 119930873.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378039911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378039919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6517901 + ... + 6517958.

It is an arithmetic number, because the mean of its divisors is an integer number (97768950).

Almost surely, 2^378039911 is an apocalyptic number.

378039911 is a deficient number, since it is larger than the sum of its proper divisors (13035889).

378039911 is a wasteful number, since it uses less digits than its factorization.

378039911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13035888.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 378039911 is about 19443.2484682987. The cubic root of 378039911 is about 723.0681257612.

The spelling of 378039911 in words is "three hundred seventy-eight million, thirty-nine thousand, nine hundred eleven".