1228992655 has 8 divisors (see below), whose sum is σ = 1608863184. Its totient is φ = 893812800.

The previous prime is 1228992641. The next prime is 1228992659. The reversal of 1228992655 is 5562998221.

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

It is not a de Polignac number, because 1228992655 - 2⁵ = 1228992623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228992599 and 1228992608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228992659) 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, 11172606 + ... + 11172715.

It is an arithmetic number, because the mean of its divisors is an integer number (201107898).

Almost surely, 2^1228992655 is an apocalyptic number.

1228992655 is a deficient number, since it is larger than the sum of its proper divisors (379870529).

1228992655 is a wasteful number, since it uses less digits than its factorization.

1228992655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22345337.

The product of its digits is 777600, while the sum is 49.

The square root of 1228992655 is about 35056.9915280818. The cubic root of 1228992655 is about 1071.1486935974.

The spelling of 1228992655 in words is "one billion, two hundred twenty-eight million, nine hundred ninety-two thousand, six hundred fifty-five".