544399821 has 24 divisors (see below), whose sum is σ = 899347904. Its totient is φ = 310858560.

The previous prime is 544399819. The next prime is 544399831. The reversal of 544399821 is 128993445.

It is not a de Polignac number, because 544399821 - 2¹ = 544399819 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544399831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124545 + ... + 128841.

Almost surely, 2^544399821 is an apocalyptic number.

It is an amenable number.

544399821 is a deficient number, since it is larger than the sum of its proper divisors (354948083).

544399821 is a wasteful number, since it uses less digits than its factorization.

544399821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321 (or 6318 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 544399821 is about 23332.3770970726. The cubic root of 544399821 is about 816.5309630040.

The spelling of 544399821 in words is "five hundred forty-four million, three hundred ninety-nine thousand, eight hundred twenty-one".