5406538 has 4 divisors (see below), whose sum is σ = 8109810. Its totient is φ = 2703268.

The previous prime is 5406529. The next prime is 5406539. The reversal of 5406538 is 8356045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8356045 = 5 ⋅1671209.

It can be written as a sum of positive squares in only one way, i.e., 4695889 + 710649 = 2167^2 + 843^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (5406539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1351633 + ... + 1351636.

Almost surely, 2^5406538 is an apocalyptic number.

5406538 is a deficient number, since it is larger than the sum of its proper divisors (2703272).

5406538 is a wasteful number, since it uses less digits than its factorization.

5406538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703271.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 5406538 is about 2325.1963357962. The cubic root of 5406538 is about 175.5118402847.

The spelling of 5406538 in words is "five million, four hundred six thousand, five hundred thirty-eight".