4478891378 has 8 divisors (see below), whose sum is σ = 7235132268. Its totient is φ = 2067180624.

The previous prime is 4478891371. The next prime is 4478891411. The reversal of 4478891378 is 8731988744.

It can be written as a sum of positive squares in 2 ways, for example, as 3695059369 + 783832009 = 60787^2 + 27997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (4478891371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86132501 + ... + 86132552.

Almost surely, 2^4478891378 is an apocalyptic number.

4478891378 is a deficient number, since it is larger than the sum of its proper divisors (2756240890).

4478891378 is a wasteful number, since it uses less digits than its factorization.

4478891378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172265068.

The product of its digits is 10838016, while the sum is 59.

The square root of 4478891378 is about 66924.5200057498. The cubic root of 4478891378 is about 1648.3781281234.

The spelling of 4478891378 in words is "four billion, four hundred seventy-eight million, eight hundred ninety-one thousand, three hundred seventy-eight".