81700026 has 8 divisors (see below), whose sum is σ = 163400064. Its totient is φ = 27233340.

The previous prime is 81700009. The next prime is 81700039. The reversal of 81700026 is 62000718.

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

81700026 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 81699969 and 81700005.

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, 6808330 + ... + 6808341.

It is an arithmetic number, because the mean of its divisors is an integer number (20425008).

Almost surely, 2^81700026 is an apocalyptic number.

81700026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81700026 is a wasteful number, since it uses less digits than its factorization.

81700026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13616676.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 81700026 is about 9038.8066690244. The cubic root of 81700026 is about 433.9177323591.

The spelling of 81700026 in words is "eighty-one million, seven hundred thousand, twenty-six".