1226638 has 16 divisors (see below), whose sum is σ = 2155104. Its totient is φ = 512640.

The previous prime is 1226629. The next prime is 1226651. The reversal of 1226638 is 8366221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495 + ... + 1642.

It is an arithmetic number, because the mean of its divisors is an integer number (134694).

2^1226638 is an apocalyptic number.

1226638 is a deficient number, since it is larger than the sum of its proper divisors (928466).

1226638 is a wasteful number, since it uses less digits than its factorization.

1226638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187.

The product of its digits is 3456, while the sum is 28.

The square root of 1226638 is about 1107.5369068343. The cubic root of 1226638 is about 107.0464176863.

The spelling of 1226638 in words is "one million, two hundred twenty-six thousand, six hundred thirty-eight".