81482480 has 40 divisors (see below), whose sum is σ = 189831600. Its totient is φ = 32526848.

The previous prime is 81482461. The next prime is 81482497. The reversal of 81482480 is 8428418.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 81482480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64091 + ... + 65349.

It is an arithmetic number, because the mean of its divisors is an integer number (4745790).

Almost surely, 2^81482480 is an apocalyptic number.

81482480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81482480 is an abundant number, since it is smaller than the sum of its proper divisors (108349120).

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

81482480 is a wasteful number, since it uses less digits than its factorization.

81482480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081 (or 2075 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 81482480 is about 9026.7646474249. The cubic root of 81482480 is about 433.5322531829.

The spelling of 81482480 in words is "eighty-one million, four hundred eighty-two thousand, four hundred eighty".