1234638 has 24 divisors (see below), whose sum is σ = 2703168. Its totient is φ = 407232.

The previous prime is 1234627. The next prime is 1234657. The reversal of 1234638 is 8364321.

It is a happy number.

1234638 is a `hidden beast` number, since 1 + 23 + 4 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1731 + ... + 2337.

It is an arithmetic number, because the mean of its divisors is an integer number (112632).

2^1234638 is an apocalyptic number.

1234638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1234638 is an abundant number, since it is smaller than the sum of its proper divisors (1468530).

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

1234638 is a wasteful number, since it uses less digits than its factorization.

1234638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 725 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1234638 is about 1111.1426551078. The cubic root of 1234638 is about 107.2786286395.

Adding to 1234638 its reverse (8364321), we get a palindrome (9598959).

It can be divided in two parts, 123 and 4638, that added together give a square (4761 = 69²).

The spelling of 1234638 in words is "one million, two hundred thirty-four thousand, six hundred thirty-eight".