799638 has 32 divisors (see below), whose sum is σ = 1858560. Its totient is φ = 224640.

The previous prime is 799637. The next prime is 799651. The reversal of 799638 is 836997.

It is a happy number.

799638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 799638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3198 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (58080).

2⁷⁹⁹⁶³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 799638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929280).

799638 is an abundant number, since it is smaller than the sum of its proper divisors (1058922).

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

799638 is a wasteful number, since it uses less digits than its factorization.

799638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its digits is 81648, while the sum is 42.

The square root of 799638 is about 894.2248039503. The cubic root of 799638 is about 92.8177724334.

The spelling of 799638 in words is "seven hundred ninety-nine thousand, six hundred thirty-eight".