5208138788 has 6 divisors (see below), whose sum is σ = 9114242886. Its totient is φ = 2604069392.

The previous prime is 5208138763. The next prime is 5208138799. The reversal of 5208138788 is 8878318025.

It can be written as a sum of positive squares in only one way, i.e., 3553113664 + 1655025124 = 59608^2 + 40682^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651017345 + ... + 651017352.

It is an arithmetic number, because the mean of its divisors is an integer number (1519040481).

Almost surely, 2^5208138788 is an apocalyptic number.

It is an amenable number.

5208138788 is a deficient number, since it is larger than the sum of its proper divisors (3906104098).

5208138788 is a wasteful number, since it uses less digits than its factorization.

5208138788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302034701 (or 1302034699 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 50.

The square root of 5208138788 is about 72167.4357865097. The cubic root of 5208138788 is about 1733.3816031758.

The spelling of 5208138788 in words is "five billion, two hundred eight million, one hundred thirty-eight thousand, seven hundred eighty-eight".