56821444 has 9 divisors (see below), whose sum is σ = 99463917. Its totient is φ = 28403184.

The previous prime is 56821433. The next prime is 56821483. The reversal of 56821444 is 44412865.

The square root of 56821444 is 7538.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 47087044 + 9734400 = 6862^2 + 3120^2 .

It is a Duffinian number.

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 in 2 ways as a sum of consecutive naturals, for example, 13192 + ... + 16960.

Almost surely, 2^56821444 is an apocalyptic number.

56821444 is the 7538-th square number.

It is an amenable number.

56821444 is a deficient number, since it is larger than the sum of its proper divisors (42642473).

56821444 is an frugal number, since it uses more digits than its factorization.

56821444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7542 (or 3771 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The cubic root of 56821444 is about 384.4478372467.

The spelling of 56821444 in words is "fifty-six million, eight hundred twenty-one thousand, four hundred forty-four".