5005438978 has 8 divisors (see below), whose sum is σ = 7510041468. Its totient is φ = 2502091824.

The previous prime is 5005438909. The next prime is 5005439027. The reversal of 5005438978 is 8798345005.

It can be written as a sum of positive squares in 2 ways, for example, as 4642650769 + 362788209 = 68137^2 + 19047^2 .

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

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, 303801 + ... + 319852.

Almost surely, 2^5005438978 is an apocalyptic number.

5005438978 is a deficient number, since it is larger than the sum of its proper divisors (2504602490).

5005438978 is a wasteful number, since it uses less digits than its factorization.

5005438978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627668.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 5005438978 is about 70749.1270476181. The cubic root of 5005438978 is about 1710.5957567591.

The spelling of 5005438978 in words is "five billion, five million, four hundred thirty-eight thousand, nine hundred seventy-eight".