80027720 has 16 divisors (see below), whose sum is σ = 180062460. Its totient is φ = 32011072.

The previous prime is 80027719. The next prime is 80027723. The reversal of 80027720 is 2772008.

It can be written as a sum of positive squares in 2 ways, for example, as 79887844 + 139876 = 8938^2 + 374^2 .

80027720 is a modest number, since divided by 27720 gives 80 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 80027720.

It is not an unprimeable number, because it can be changed into a prime (80027723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000307 + ... + 1000386.

Almost surely, 2^80027720 is an apocalyptic number.

It is an amenable number.

80027720 is an abundant number, since it is smaller than the sum of its proper divisors (100034740).

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

80027720 is a wasteful number, since it uses less digits than its factorization.

80027720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000704 (or 2000700 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 80027720 is about 8945.8213708971. The cubic root of 80027720 is about 430.9366997007.

Adding to 80027720 its reverse (2772008), we get a palindrome (82799728).

The spelling of 80027720 in words is "eighty million, twenty-seven thousand, seven hundred twenty".