1204638 has 16 divisors (see below), whose sum is σ = 2536320. Its totient is φ = 380376.

The previous prime is 1204633. The next prime is 1204649. The reversal of 1204638 is 8364021.

It is a happy number.

It is a super-2 number, since 2×1204638² = 2902305422088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5170 + ... + 5397.

It is an arithmetic number, because the mean of its divisors is an integer number (158520).

2^1204638 is an apocalyptic number.

1204638 is an abundant number, since it is smaller than the sum of its proper divisors (1331682).

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

1204638 is a wasteful number, since it uses less digits than its factorization.

1204638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10591.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1204638 is about 1097.5600211378. The cubic root of 1204638 is about 106.4025867613.

Adding to 1204638 its reverse (8364021), we get a palindrome (9568659).

The spelling of 1204638 in words is "one million, two hundred four thousand, six hundred thirty-eight".