22028554 has 4 divisors (see below), whose sum is σ = 33042834. Its totient is φ = 11014276.

The previous prime is 22028551. The next prime is 22028557. The reversal of 22028554 is 45582022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45582022 = 2 ⋅22791011.

It is an interprime number because it is at equal distance from previous prime (22028551) and next prime (22028557).

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 2181529 = 4455^2 + 1477^2 .

It is not an unprimeable number, because it can be changed into a prime (22028551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5507137 + ... + 5507140.

Almost surely, 2^22028554 is an apocalyptic number.

22028554 is a deficient number, since it is larger than the sum of its proper divisors (11014280).

22028554 is a wasteful number, since it uses less digits than its factorization.

22028554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11014279.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 22028554 is about 4693.4586394257. The cubic root of 22028554 is about 280.3251070670.

The spelling of 22028554 in words is "twenty-two million, twenty-eight thousand, five hundred fifty-four".