1078638 has 32 divisors (see below), whose sum is σ = 2401920. Its totient is φ = 320160.

The previous prime is 1078589. The next prime is 1078643. The reversal of 1078638 is 8368701.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1078599 and 1078608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3756 + ... + 4032.

It is an arithmetic number, because the mean of its divisors is an integer number (75060).

2^1078638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1078638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1200960).

1078638 is an abundant number, since it is smaller than the sum of its proper divisors (1323282).

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

1078638 is a wasteful number, since it uses less digits than its factorization.

1078638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1078638 is about 1038.5749852562. The cubic root of 1078638 is about 102.5554092642. Note that the first 3 decimals are identical.

The spelling of 1078638 in words is "one million, seventy-eight thousand, six hundred thirty-eight".