1228778 has 8 divisors (see below), whose sum is σ = 1902720. Its totient is φ = 594540.

The previous prime is 1228763. The next prime is 1228783. The reversal of 1228778 is 8778221.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9848 + ... + 9971.

It is an arithmetic number, because the mean of its divisors is an integer number (237840).

2^1228778 is an apocalyptic number.

1228778 is a deficient number, since it is larger than the sum of its proper divisors (673942).

1228778 is a wasteful number, since it uses less digits than its factorization.

1228778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19852.

The product of its digits is 12544, while the sum is 35.

The square root of 1228778 is about 1108.5025935919. The cubic root of 1228778 is about 107.1086327938.

It can be divided in two parts, 122 and 8778, that multiplied together give a triangular number (1070916 = T₁₄₆₃).

The spelling of 1228778 in words is "one million, two hundred twenty-eight thousand, seven hundred seventy-eight".