5393978 has 4 divisors (see below), whose sum is σ = 8090970. Its totient is φ = 2696988.

The previous prime is 5393959. The next prime is 5393987. The reversal of 5393978 is 8793935.

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., 4439449 + 954529 = 2107^2 + 977^2 .

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, 1348493 + ... + 1348496.

Almost surely, 2^5393978 is an apocalyptic number.

5393978 is a deficient number, since it is larger than the sum of its proper divisors (2696992).

5393978 is a wasteful number, since it uses less digits than its factorization.

5393978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696991.

The product of its digits is 204120, while the sum is 44.

The square root of 5393978 is about 2322.4939181836. The cubic root of 5393978 is about 175.3758236097.

The spelling of 5393978 in words is "five million, three hundred ninety-three thousand, nine hundred seventy-eight".