81484344 has 24 divisors (see below), whose sum is σ = 220686960. Its totient is φ = 27161424.

The previous prime is 81484339. The next prime is 81484379. The reversal of 81484344 is 44348418.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×81484344² = 13279396634220672, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 81484299 and 81484308.

It is a congruent number.

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, 565792 + ... + 565935.

It is an arithmetic number, because the mean of its divisors is an integer number (9195290).

Almost surely, 2^81484344 is an apocalyptic number.

It is an amenable number.

81484344 is an abundant number, since it is smaller than the sum of its proper divisors (139202616).

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

81484344 is a wasteful number, since it uses less digits than its factorization.

81484344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131739 (or 1131732 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 81484344 is about 9026.8678953444. The cubic root of 81484344 is about 433.5355589977.

It can be divided in two parts, 814 and 84344, that added together give a palindrome (85158).

The spelling of 81484344 in words is "eighty-one million, four hundred eighty-four thousand, three hundred forty-four".