81062528 has 32 divisors (see below), whose sum is σ = 170995860. Its totient is φ = 38146048.

The previous prime is 81062497. The next prime is 81062539. The reversal of 81062528 is 82526018.

It can be written as a sum of positive squares in 2 ways, for example, as 60341824 + 20720704 = 7768^2 + 4552^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×81062528² = 13142266891501568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 81062494 and 81062503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16451 + ... + 20802.

Almost surely, 2^81062528 is an apocalyptic number.

It is an amenable number.

81062528 is an abundant number, since it is smaller than the sum of its proper divisors (89933332).

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

81062528 is a wasteful number, since it uses less digits than its factorization.

81062528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37284 (or 37272 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 81062528 is about 9003.4731076402. The cubic root of 81062528 is about 432.7861770009.

The spelling of 81062528 in words is "eighty-one million, sixty-two thousand, five hundred twenty-eight".