2228639881 has 8 divisors (see below), whose sum is σ = 2407329344. Its totient is φ = 2050986960.

The previous prime is 2228639857. The next prime is 2228639899. The reversal of 2228639881 is 1889368222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2228639881 - 2⁷ = 2228639753 is a prime.

It is a super-2 number, since 2×2228639881² = 9933671438367388322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2228639081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254661 + ... + 263266.

It is an arithmetic number, because the mean of its divisors is an integer number (300916168).

Almost surely, 2^2228639881 is an apocalyptic number.

It is an amenable number.

2228639881 is a deficient number, since it is larger than the sum of its proper divisors (178689463).

2228639881 is a wasteful number, since it uses less digits than its factorization.

2228639881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518271.

The product of its digits is 663552, while the sum is 49.

The square root of 2228639881 is about 47208.4725552522. The cubic root of 2228639881 is about 1306.2108872670.

The spelling of 2228639881 in words is "two billion, two hundred twenty-eight million, six hundred thirty-nine thousand, eight hundred eighty-one".