1228081937 has 8 divisors (see below), whose sum is σ = 1271500200. Its totient is φ = 1184735104.

The previous prime is 1228081931. The next prime is 1228081949. The reversal of 1228081937 is 7391808221.

It is a Cunningham number, because it is equal to 35044²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 643941376 + 584140561 = 25376^2 + 24169^2 .

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 1228081937 - 2¹⁸ = 1227819793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228081894 and 1228081903.

It is not an unprimeable number, because it can be changed into a prime (1228081931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18413 + ... + 52869.

It is an arithmetic number, because the mean of its divisors is an integer number (158937525).

Almost surely, 2^1228081937 is an apocalyptic number.

It is an amenable number.

1228081937 is a deficient number, since it is larger than the sum of its proper divisors (43418263).

1228081937 is a wasteful number, since it uses less digits than its factorization.

1228081937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35715.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1228081937 is about 35044.0000142678. Note that the first 4 decimals coincide. The cubic root of 1228081937 is about 1070.8840444822.

The spelling of 1228081937 in words is "one billion, two hundred twenty-eight million, eighty-one thousand, nine hundred thirty-seven".