2028444430621 has 16 divisors (see below), whose sum is σ = 2324185436160. Its totient is φ = 1734195774960.

The previous prime is 2028444430609. The next prime is 2028444430637. The reversal of 2028444430621 is 1260344448202.

It is a cyclic number.

It is not a de Polignac number, because 2028444430621 - 2²³ = 2028436042013 is a prime.

It is a super-2 number, since 2×2028444430621² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028444430651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16501416 + ... + 16623886.

It is an arithmetic number, because the mean of its divisors is an integer number (145261589760).

Almost surely, 2^{2028444430621} is an apocalyptic number.

It is an amenable number.

2028444430621 is a deficient number, since it is larger than the sum of its proper divisors (295741005539).

2028444430621 is a wasteful number, since it uses less digits than its factorization.

2028444430621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128544.

The product of its (nonzero) digits is 294912, while the sum is 40.

Adding to 2028444430621 its reverse (1260344448202), we get a palindrome (3288788878823).

The spelling of 2028444430621 in words is "two trillion, twenty-eight billion, four hundred forty-four million, four hundred thirty thousand, six hundred twenty-one".