1036638 has 36 divisors (see below), whose sum is σ = 2361840. Its totient is φ = 341172.

The previous prime is 1036631. The next prime is 1036649. The reversal of 1036638 is 8366301.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1036631) 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 17 ways as a sum of consecutive naturals, for example, 13083 + ... + 13161.

2^1036638 is an apocalyptic number.

1036638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1036638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180920).

1036638 is an abundant number, since it is smaller than the sum of its proper divisors (1325202).

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

1036638 is an frugal number, since it uses more digits than its factorization.

1036638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1036638 is about 1018.1542122881. The cubic root of 1036638 is about 101.2066481075.

It can be divided in two parts, 10366 and 38, that added together give a square (10404 = 102²).

The spelling of 1036638 in words is "one million, thirty-six thousand, six hundred thirty-eight".