5287778 has 4 divisors (see below), whose sum is σ = 7931670. Its totient is φ = 2643888.

The previous prime is 5287741. The next prime is 5287783. The reversal of 5287778 is 8777825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5257849 + 29929 = 2293^2 + 173^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1321943 + ... + 1321946.

Almost surely, 2^5287778 is an apocalyptic number.

5287778 is a deficient number, since it is larger than the sum of its proper divisors (2643892).

5287778 is a wasteful number, since it uses less digits than its factorization.

5287778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643891.

The product of its digits is 219520, while the sum is 44.

The square root of 5287778 is about 2299.5169057870. The cubic root of 5287778 is about 174.2172167192.

The spelling of 5287778 in words is "five million, two hundred eighty-seven thousand, seven hundred seventy-eight".