378457647 has 4 divisors (see below), whose sum is σ = 504610200. Its totient is φ = 252305096.

The previous prime is 378457643. The next prime is 378457649. The reversal of 378457647 is 746754873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746754873 = 3 ⋅248918291.

It is a cyclic number.

It is not a de Polignac number, because 378457647 - 2² = 378457643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378457647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378457643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63076272 + ... + 63076277.

It is an arithmetic number, because the mean of its divisors is an integer number (126152550).

Almost surely, 2^378457647 is an apocalyptic number.

378457647 is a deficient number, since it is larger than the sum of its proper divisors (126152553).

378457647 is a wasteful number, since it uses less digits than its factorization.

378457647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126152552.

The product of its digits is 3951360, while the sum is 51.

The square root of 378457647 is about 19453.9879459200. The cubic root of 378457647 is about 723.3343590255.

The spelling of 378457647 in words is "three hundred seventy-eight million, four hundred fifty-seven thousand, six hundred forty-seven".