81962528 has 48 divisors (see below), whose sum is σ = 165614400. Its totient is φ = 39916800.

The previous prime is 81962521. The next prime is 81962533. The reversal of 81962528 is 82526918.

It is not an unprimeable number, because it can be changed into a prime (81962521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388343 + ... + 388553.

It is an arithmetic number, because the mean of its divisors is an integer number (3450300).

Almost surely, 2^81962528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81962528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82807200).

81962528 is an abundant number, since it is smaller than the sum of its proper divisors (83651872).

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

81962528 is a wasteful number, since it uses less digits than its factorization.

81962528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 473 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 81962528 is about 9053.3158566351. The cubic root of 81962528 is about 434.3819610913.

The spelling of 81962528 in words is "eighty-one million, nine hundred sixty-two thousand, five hundred twenty-eight".