2028421444 has 27 divisors (see below), whose sum is σ = 4130570493. Its totient is φ = 869053248.

The previous prime is 2028421429. The next prime is 2028421457. The reversal of 2028421444 is 4441248202.

The square root of 2028421444 is 45038.

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., 1829272900 + 199148544 = 42770^2 + 14112^2 .

It is a super-2 number, since 2×2028421444² = 8228987108958090272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 628924 + ... + 632140.

Almost surely, 2^2028421444 is an apocalyptic number.

2028421444 is the 45038-th square number.

It is an amenable number.

2028421444 is an abundant number, since it is smaller than the sum of its proper divisors (2102149049).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2028421444 is an frugal number, since it uses more digits than its factorization.

2028421444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452 (or 3226 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 31.

The cubic root of 2028421444 is about 1265.8611297786.

Multiplying 2028421444 by its product of nonzero digits (16384), we get a square (33233656938496 = 5764864²).

Adding to 2028421444 its reverse (4441248202), we get a palindrome (6469669646).

The spelling of 2028421444 in words is "two billion, twenty-eight million, four hundred twenty-one thousand, four hundred forty-four".