448787978 has 8 divisors (see below), whose sum is σ = 673518240. Its totient is φ = 224281900.

The previous prime is 448787959. The next prime is 448787987. The reversal of 448787978 is 879787844.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 448787978.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50948 + ... + 59103.

It is an arithmetic number, because the mean of its divisors is an integer number (84189780).

Almost surely, 2^448787978 is an apocalyptic number.

448787978 is a deficient number, since it is larger than the sum of its proper divisors (224730262).

448787978 is a wasteful number, since it uses less digits than its factorization.

448787978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112092.

The product of its digits is 25288704, while the sum is 62.

The square root of 448787978 is about 21184.6165412546. The cubic root of 448787978 is about 765.6208257287.

The spelling of 448787978 in words is "four hundred forty-eight million, seven hundred eighty-seven thousand, nine hundred seventy-eight".