1228081935 has 32 divisors (see below), whose sum is σ = 2023135488. Its totient is φ = 635765760.

The previous prime is 1228081931. The next prime is 1228081949. The reversal of 1228081935 is 5391808221.

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

It is not a de Polignac number, because 1228081935 - 2² = 1228081931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1228081893 and 1228081902.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 99295 + ... + 110975.

It is an arithmetic number, because the mean of its divisors is an integer number (63222984).

Almost surely, 2^1228081935 is an apocalyptic number.

1228081935 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1228081935 is a deficient number, since it is larger than the sum of its proper divisors (795053553).

1228081935 is a wasteful number, since it uses less digits than its factorization.

1228081935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11895.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1228081935 is about 35043.9999857322. Note that the first 4 decimals coincide. The cubic root of 1228081935 is about 1070.8840439008.

The spelling of 1228081935 in words is "one billion, two hundred twenty-eight million, eighty-one thousand, nine hundred thirty-five".