80798436 has 18 divisors (see below), whose sum is σ = 204240582. Its totient is φ = 26932800.

The previous prime is 80798429. The next prime is 80798461. The reversal of 80798436 is 63489708.

Added to its reverse (63489708) it gives a square (144288144 = 12012²).

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 58614336 + 22184100 = 7656^2 + 4710^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 80798391 and 80798400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122165 + ... + 1122236.

It is an arithmetic number, because the mean of its divisors is an integer number (11346699).

Almost surely, 2^80798436 is an apocalyptic number.

It is an amenable number.

80798436 is an abundant number, since it is smaller than the sum of its proper divisors (123442146).

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

80798436 is a wasteful number, since it uses less digits than its factorization.

80798436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244411 (or 2244406 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 80798436 is about 8988.7950249185. The cubic root of 80798436 is about 432.3156771895.

Adding to 80798436 its reverse (63489708), we get a square (144288144 = 12012²).

The spelling of 80798436 in words is "eighty million, seven hundred ninety-eight thousand, four hundred thirty-six".