6444428 has 12 divisors (see below), whose sum is σ = 11941272. Its totient is φ = 3032640.

The previous prime is 6444413. The next prime is 6444437. The reversal of 6444428 is 8244446.

6444428 = T₄₇₇ + T₄₇₈ + ... + T₅₂₇.

It is a junction number, because it is equal to n+sod(n) for n = 6444394 and 6444403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47318 + ... + 47453.

It is an arithmetic number, because the mean of its divisors is an integer number (995106).

Almost surely, 2^6444428 is an apocalyptic number.

6444428 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6444428 is a deficient number, since it is larger than the sum of its proper divisors (5496844).

6444428 is a wasteful number, since it uses less digits than its factorization.

6444428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94792 (or 94790 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

The square root of 6444428 is about 2538.5877963939. The cubic root of 6444428 is about 186.0921807697.

The spelling of 6444428 in words is "six million, four hundred forty-four thousand, four hundred twenty-eight".