5191988 has 12 divisors (see below), whose sum is σ = 9331812. Its totient is φ = 2525760.

The previous prime is 5191981. The next prime is 5191999. The reversal of 5191988 is 8891915.

It can be written as a sum of positive squares in 2 ways, for example, as 4571044 + 620944 = 2138^2 + 788^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5191981) 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, 17393 + ... + 17688.

It is an arithmetic number, because the mean of its divisors is an integer number (777651).

Almost surely, 2^5191988 is an apocalyptic number.

It is an amenable number.

5191988 is a deficient number, since it is larger than the sum of its proper divisors (4139824).

5191988 is a wasteful number, since it uses less digits than its factorization.

5191988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35122 (or 35120 counting only the distinct ones).

The product of its digits is 25920, while the sum is 41.

The square root of 5191988 is about 2278.5934257783. The cubic root of 5191988 is about 173.1587970267.

The spelling of 5191988 in words is "five million, one hundred ninety-one thousand, nine hundred eighty-eight".