378777774 has 16 divisors (see below), whose sum is σ = 757860480. Its totient is φ = 126208440.

The previous prime is 378777761. The next prime is 378777779. The reversal of 378777774 is 477777873.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378777779) 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, 5437 + ... + 28055.

It is an arithmetic number, because the mean of its divisors is an integer number (47366280).

Almost surely, 2^378777774 is an apocalyptic number.

378777774 is an abundant number, since it is smaller than the sum of its proper divisors (379082706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

378777774 is a wasteful number, since it uses less digits than its factorization.

378777774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25415.

The product of its digits is 11294304, while the sum is 57.

The square root of 378777774 is about 19462.2140056058. The cubic root of 378777774 is about 723.5382511485.

Subtracting 378777774 from its reverse (477777873), we obtain a palindrome (99000099).

The spelling of 378777774 in words is "three hundred seventy-eight million, seven hundred seventy-seven thousand, seven hundred seventy-four".