81478088 has 8 divisors (see below), whose sum is σ = 152771430. Its totient is φ = 40739040.

The previous prime is 81478087. The next prime is 81478129. The reversal of 81478088 is 88087418.

It can be written as a sum of positive squares in only one way, i.e., 47582404 + 33895684 = 6898^2 + 5822^2 .

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 (81478087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5092373 + ... + 5092388.

Almost surely, 2^81478088 is an apocalyptic number.

It is an amenable number.

81478088 is a deficient number, since it is larger than the sum of its proper divisors (71293342).

81478088 is a wasteful number, since it uses less digits than its factorization.

81478088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184767 (or 10184763 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 81478088 is about 9026.5213676144. The cubic root of 81478088 is about 433.5244637462.

The spelling of 81478088 in words is "eighty-one million, four hundred seventy-eight thousand, eighty-eight".