2028222649 has 4 divisors (see below), whose sum is σ = 2046171636. Its totient is φ = 2010273664.

The previous prime is 2028222617. The next prime is 2028222653. The reversal of 2028222649 is 9462228202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 564395049 + 1463827600 = 23757^2 + 38260^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028222649 - 2⁵ = 2028222617 is a prime.

It is a super-2 number, since 2×2028222649² = 8227374227833154402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028222149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8974324 + ... + 8974549.

It is an arithmetic number, because the mean of its divisors is an integer number (511542909).

Almost surely, 2^2028222649 is an apocalyptic number.

It is an amenable number.

2028222649 is a deficient number, since it is larger than the sum of its proper divisors (17948987).

2028222649 is a wasteful number, since it uses less digits than its factorization.

2028222649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17948986.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 2028222649 is about 45035.7929762539. The cubic root of 2028222649 is about 1265.8197749466.

The spelling of 2028222649 in words is "two billion, twenty-eight million, two hundred twenty-two thousand, six hundred forty-nine".