80981244 has 36 divisors (see below), whose sum is σ = 208569816. Its totient is φ = 26483808.

The previous prime is 80981239. The next prime is 80981267. The reversal of 80981244 is 44218908.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×80981244³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80981199 and 80981208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19314 + ... + 23129.

It is an arithmetic number, because the mean of its divisors is an integer number (5793606).

Almost surely, 2^80981244 is an apocalyptic number.

It is an amenable number.

80981244 is an abundant number, since it is smaller than the sum of its proper divisors (127588572).

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

80981244 is a wasteful number, since it uses less digits than its factorization.

80981244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42506 (or 42501 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 80981244 is about 8998.9579396728. The cubic root of 80981244 is about 432.6414724242.

It can be divided in two parts, 80981 and 244, that added together give a square (81225 = 285²).

The spelling of 80981244 in words is "eighty million, nine hundred eighty-one thousand, two hundred forty-four".