6440054 has 4 divisors (see below), whose sum is σ = 9660084. Its totient is φ = 3220026.

The previous prime is 6440041. The next prime is 6440089. The reversal of 6440054 is 4500446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4500446 = 2 ⋅2250223.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610012 + ... + 1610015.

It is an arithmetic number, because the mean of its divisors is an integer number (2415021).

Almost surely, 2^6440054 is an apocalyptic number.

6440054 is a deficient number, since it is larger than the sum of its proper divisors (3220030).

6440054 is a wasteful number, since it uses less digits than its factorization.

6440054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220029.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6440054 is about 2537.7261475581. The cubic root of 6440054 is about 186.0500693818.

The spelling of 6440054 in words is "six million, four hundred forty thousand, fifty-four".