80271620 has 144 divisors (see below), whose sum is σ = 212502528. Its totient is φ = 25159680.

The previous prime is 80271619. The next prime is 80271641. The reversal of 80271620 is 2617208.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 80271620.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 631997 + ... + 632123.

It is an arithmetic number, because the mean of its divisors is an integer number (1475712).

Almost surely, 2^80271620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80271620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106251264).

80271620 is an abundant number, since it is smaller than the sum of its proper divisors (132230908).

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

80271620 is a wasteful number, since it uses less digits than its factorization.

80271620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 80271620 is about 8959.4430630481. The cubic root of 80271620 is about 431.3740434321.

Adding to 80271620 its reverse (2617208), we get a palindrome (82888828).

The spelling of 80271620 in words is "eighty million, two hundred seventy-one thousand, six hundred twenty".