5287978 has 4 divisors (see below), whose sum is σ = 7931970. Its totient is φ = 2643988.

The previous prime is 5287973. The next prime is 5287979. The reversal of 5287978 is 8797825.

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., 2832489 + 2455489 = 1683^2 + 1567^2 .

It is a super-2 number, since 2×5287978² = 55925422656968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5287973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321993 + ... + 1321996.

Almost surely, 2^5287978 is an apocalyptic number.

5287978 is a deficient number, since it is larger than the sum of its proper divisors (2643992).

5287978 is a wasteful number, since it uses less digits than its factorization.

5287978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643991.

The product of its digits is 282240, while the sum is 46.

The square root of 5287978 is about 2299.5603927708. The cubic root of 5287978 is about 174.2194131682.

The spelling of 5287978 in words is "five million, two hundred eighty-seven thousand, nine hundred seventy-eight".