1229638 has 8 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 604680.

The previous prime is 1229633. The next prime is 1229647. The reversal of 1229638 is 8369221.

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

It is a super-2 number, since 2×1229638² = 3024019222088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229633) 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, 4918 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (234360).

2^1229638 is an apocalyptic number.

1229638 is a deficient number, since it is larger than the sum of its proper divisors (645242).

1229638 is a wasteful number, since it uses less digits than its factorization.

1229638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10142.

The product of its digits is 5184, while the sum is 31.

The square root of 1229638 is about 1108.8904364273. The cubic root of 1229638 is about 107.1336147795.

The spelling of 1229638 in words is "one million, two hundred twenty-nine thousand, six hundred thirty-eight".