5138878 has 4 divisors (see below), whose sum is σ = 7708320. Its totient is φ = 2569438.

The previous prime is 5138869. The next prime is 5138891. The reversal of 5138878 is 8788315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8788315 = 5 ⋅1757663.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 5138878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284718 + ... + 1284721.

It is an arithmetic number, because the mean of its divisors is an integer number (1927080).

Almost surely, 2^5138878 is an apocalyptic number.

5138878 is a deficient number, since it is larger than the sum of its proper divisors (2569442).

5138878 is a wasteful number, since it uses less digits than its factorization.

5138878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569441.

The product of its digits is 53760, while the sum is 40.

The square root of 5138878 is about 2266.9093497535. The cubic root of 5138878 is about 172.5663456899.

The spelling of 5138878 in words is "five million, one hundred thirty-eight thousand, eight hundred seventy-eight".