378134649 has 20 divisors (see below), whose sum is σ = 565600464. Its totient is φ = 251762904.

The previous prime is 378134641. The next prime is 378134719. The reversal of 378134649 is 946431873.

It is not a de Polignac number, because 378134649 - 2³ = 378134641 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (378134641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70894 + ... + 76040.

Almost surely, 2^378134649 is an apocalyptic number.

It is an amenable number.

378134649 is a deficient number, since it is larger than the sum of its proper divisors (187465815).

378134649 is an equidigital number, since it uses as much as digits as its factorization.

378134649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6066 (or 6057 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 378134649 is about 19445.6845855321. The cubic root of 378134649 is about 723.1285217711.

The spelling of 378134649 in words is "three hundred seventy-eight million, one hundred thirty-four thousand, six hundred forty-nine".