378787849 has 4 divisors (see below), whose sum is σ = 413223120. Its totient is φ = 344352580.

The previous prime is 378787837. The next prime is 378787883. The reversal of 378787849 is 948787873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 378787849 - 2⁹ = 378787337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378787049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17217619 + ... + 17217640.

It is an arithmetic number, because the mean of its divisors is an integer number (103305780).

Almost surely, 2^378787849 is an apocalyptic number.

It is an amenable number.

378787849 is a deficient number, since it is larger than the sum of its proper divisors (34435271).

378787849 is a wasteful number, since it uses less digits than its factorization.

378787849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34435270.

The product of its digits is 18966528, while the sum is 61.

The square root of 378787849 is about 19462.4728387736. The cubic root of 378787849 is about 723.5446661528.

The spelling of 378787849 in words is "three hundred seventy-eight million, seven hundred eighty-seven thousand, eight hundred forty-nine".