5387978 has 4 divisors (see below), whose sum is σ = 8081970. Its totient is φ = 2693988.

The previous prime is 5387951. The next prime is 5387983. The reversal of 5387978 is 8797835.

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., 5230369 + 157609 = 2287^2 + 397^2 .

It is a Curzon 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, 1346993 + ... + 1346996.

Almost surely, 2^5387978 is an apocalyptic number.

5387978 is a deficient number, since it is larger than the sum of its proper divisors (2693992).

5387978 is a wasteful number, since it uses less digits than its factorization.

5387978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693991.

The product of its digits is 423360, while the sum is 47.

The square root of 5387978 is about 2321.2018438731. The cubic root of 5387978 is about 175.3107729586.

The spelling of 5387978 in words is "five million, three hundred eighty-seven thousand, nine hundred seventy-eight".