5138388 has 18 divisors (see below), whose sum is σ = 12988794. Its totient is φ = 1712784.

The previous prime is 5138387. The next prime is 5138443. The reversal of 5138388 is 8838315.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3283344 + 1855044 = 1812^2 + 1362^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 142733 = 5138388 / (5 + 1 + 3 + 8 + 3 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5138383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71331 + ... + 71402.

Almost surely, 2^5138388 is an apocalyptic number.

It is an amenable number.

5138388 is an abundant number, since it is smaller than the sum of its proper divisors (7850406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5138388 is a wasteful number, since it uses less digits than its factorization.

5138388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142743 (or 142738 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 5138388 is about 2266.8012705131. The cubic root of 5138388 is about 172.5608606925.

The spelling of 5138388 in words is "five million, one hundred thirty-eight thousand, three hundred eighty-eight".