1228650 has 24 divisors (see below), whose sum is σ = 3047424. Its totient is φ = 327600.

The previous prime is 1228631. The next prime is 1228651. The reversal of 1228650 is 568221.

It is a self number, because there is not a number n which added to its sum of digits gives 1228650.

It is not an unprimeable number, because it can be changed into a prime (1228651) 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 11 ways as a sum of consecutive naturals, for example, 3946 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (126976).

2^1228650 is an apocalyptic number.

1228650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1228650 is an abundant number, since it is smaller than the sum of its proper divisors (1818774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1228650 is a wasteful number, since it uses less digits than its factorization.

1228650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206 (or 8201 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1228650 is about 1108.4448565445. Note that the first 3 decimals coincide. The cubic root of 1228650 is about 107.1049135484.

The spelling of 1228650 in words is "one million, two hundred twenty-eight thousand, six hundred fifty".