81480008 has 8 divisors (see below), whose sum is σ = 152775030. Its totient is φ = 40740000.

The previous prime is 81480001. The next prime is 81480011. The reversal of 81480008 is 80008418.

It can be written as a sum of positive squares in only one way, i.e., 69522244 + 11957764 = 8338^2 + 3458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (81480001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5092493 + ... + 5092508.

Almost surely, 2^81480008 is an apocalyptic number.

It is an amenable number.

81480008 is a deficient number, since it is larger than the sum of its proper divisors (71295022).

81480008 is a wasteful number, since it uses less digits than its factorization.

81480008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10185007 (or 10185003 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 81480008 is about 9026.6277202508. The cubic root of 81480008 is about 433.5278689988.

The spelling of 81480008 in words is "eighty-one million, four hundred eighty thousand, eight".