378646874 has 4 divisors (see below), whose sum is σ = 567970314. Its totient is φ = 189323436.

The previous prime is 378646871. The next prime is 378646889. The reversal of 378646874 is 478646873.

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

It can be written as a sum of positive squares in only one way, i.e., 287539849 + 91107025 = 16957^2 + 9545^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (378646871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94661717 + ... + 94661720.

Almost surely, 2^378646874 is an apocalyptic number.

378646874 is a deficient number, since it is larger than the sum of its proper divisors (189323440).

378646874 is a wasteful number, since it uses less digits than its factorization.

378646874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189323439.

The product of its digits is 5419008, while the sum is 53.

The square root of 378646874 is about 19458.8507882660. The cubic root of 378646874 is about 723.4548935037.

Subtracting 378646874 from its reverse (478646873), we obtain a palindrome (99999999).

The spelling of 378646874 in words is "three hundred seventy-eight million, six hundred forty-six thousand, eight hundred seventy-four".