81295038 has 48 divisors (see below), whose sum is σ = 195436800. Its totient is φ = 24213840.

The previous prime is 81295009. The next prime is 81295043. The reversal of 81295038 is 83059218.

It is a junction number, because it is equal to n+sod(n) for n = 81294993 and 81295011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8203 + ... + 15161.

It is an arithmetic number, because the mean of its divisors is an integer number (4071600).

Almost surely, 2^81295038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81295038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97718400).

81295038 is an abundant number, since it is smaller than the sum of its proper divisors (114141762).

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

81295038 is a wasteful number, since it uses less digits than its factorization.

81295038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037 (or 7034 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 81295038 is about 9016.3761012948. The cubic root of 81295038 is about 433.1995659431.

The spelling of 81295038 in words is "eighty-one million, two hundred ninety-five thousand, thirty-eight".