798440 has 16 divisors (see below), whose sum is σ = 1796580. Its totient is φ = 319360.

The previous prime is 798409. The next prime is 798443. The reversal of 798440 is 44897.

It is a happy number.

798440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 770884 + 27556 = 878^2 + 166^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 798397 and 798406.

It is not an unprimeable number, because it can be changed into a prime (798443) by changing a digit.

798440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9941 + ... + 10020.

2⁷⁹⁸⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

798440 is an abundant number, since it is smaller than the sum of its proper divisors (998140).

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

798440 is a wasteful number, since it uses less digits than its factorization.

798440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19972 (or 19968 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 798440 is about 893.5546989413. The cubic root of 798440 is about 92.7713967534.

The spelling of 798440 in words is "seven hundred ninety-eight thousand, four hundred forty".