1228877918 has 8 divisors (see below), whose sum is σ = 1843727160. Its totient is φ = 614302200.

The previous prime is 1228877917. The next prime is 1228877921. The reversal of 1228877918 is 8197788221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1228877918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228877917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56753 + ... + 75356.

It is an arithmetic number, because the mean of its divisors is an integer number (230465895).

Almost surely, 2^1228877918 is an apocalyptic number.

1228877918 is a deficient number, since it is larger than the sum of its proper divisors (614849242).

1228877918 is a wasteful number, since it uses less digits than its factorization.

1228877918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136762.

The product of its digits is 903168, while the sum is 53.

The square root of 1228877918 is about 35055.3550545420. The cubic root of 1228877918 is about 1071.1153589223.

The spelling of 1228877918 in words is "one billion, two hundred twenty-eight million, eight hundred seventy-seven thousand, nine hundred eighteen".