5187978 has 24 divisors (see below), whose sum is σ = 11297988. Its totient is φ = 1720512.

The previous prime is 5187977. The next prime is 5187979. The reversal of 5187978 is 8797815.

It is an interprime number because it is at equal distance from previous prime (5187977) and next prime (5187979).

It can be written as a sum of positive squares in 2 ways, for example, as 5184729 + 3249 = 2277^2 + 57^2 .

It is not an unprimeable number, because it can be changed into a prime (5187971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3576 + ... + 4812.

Almost surely, 2^5187978 is an apocalyptic number.

5187978 is an abundant number, since it is smaller than the sum of its proper divisors (6110010).

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

5187978 is a wasteful number, since it uses less digits than its factorization.

5187978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478 (or 1475 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The square root of 5187978 is about 2277.7133270014. The cubic root of 5187978 is about 173.1142061676.

The spelling of 5187978 in words is "five million, one hundred eighty-seven thousand, nine hundred seventy-eight".