81408086 has 8 divisors (see below), whose sum is σ = 127421424. Its totient is φ = 38934280.

The previous prime is 81408059. The next prime is 81408101. The reversal of 81408086 is 68080418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884825 + ... + 884916.

It is an arithmetic number, because the mean of its divisors is an integer number (15927678).

Almost surely, 2^81408086 is an apocalyptic number.

81408086 is a deficient number, since it is larger than the sum of its proper divisors (46013338).

81408086 is a wasteful number, since it uses less digits than its factorization.

81408086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769766.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 81408086 is about 9022.6429609067. The cubic root of 81408086 is about 433.4002738138.

The spelling of 81408086 in words is "eighty-one million, four hundred eight thousand, eighty-six".