5181778 has 16 divisors (see below), whose sum is σ = 9190080. Its totient is φ = 2144016.

The previous prime is 5181769. The next prime is 5181779. The reversal of 5181778 is 8771815.

It is not an unprimeable number, because it can be changed into a prime (5181779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5976 + ... + 6787.

It is an arithmetic number, because the mean of its divisors is an integer number (574380).

Almost surely, 2^5181778 is an apocalyptic number.

5181778 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

5181778 is a deficient number, since it is larger than the sum of its proper divisors (4008302).

5181778 is a wasteful number, since it uses less digits than its factorization.

5181778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12801.

The product of its digits is 15680, while the sum is 37.

The square root of 5181778 is about 2276.3519060110. The cubic root of 5181778 is about 173.0452174452.

Adding to 5181778 its sum of digits (37), we get a palindrome (5181815).

The spelling of 5181778 in words is "five million, one hundred eighty-one thousand, seven hundred seventy-eight".