81795030 has 64 divisors (see below), whose sum is σ = 202625280. Its totient is φ = 21119616.

The previous prime is 81795029. The next prime is 81795031. The reversal of 81795030 is 3059718.

It is an interprime number because it is at equal distance from previous prime (81795029) and next prime (81795031).

It is a junction number, because it is equal to n+sod(n) for n = 81794982 and 81795000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81795031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210076 + ... + 210464.

It is an arithmetic number, because the mean of its divisors is an integer number (3166020).

Almost surely, 2^81795030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81795030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101312640).

81795030 is an abundant number, since it is smaller than the sum of its proper divisors (120830250).

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

81795030 is a wasteful number, since it uses less digits than its factorization.

81795030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 81795030 is about 9044.0604818853. The cubic root of 81795030 is about 434.0858594032.

The spelling of 81795030 in words is "eighty-one million, seven hundred ninety-five thousand, thirty".