81062000 has 40 divisors (see below), whose sum is σ = 196012752. Its totient is φ = 32424000.

The previous prime is 81061991. The next prime is 81062017. The reversal of 81062000 is 26018.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 81062000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18266 + ... + 22265.

Almost surely, 2^81062000 is an apocalyptic number.

81062000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81062000 is an abundant number, since it is smaller than the sum of its proper divisors (114950752).

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

81062000 is a wasteful number, since it uses less digits than its factorization.

81062000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40554 (or 40538 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 81062000 is about 9003.4437855745. The cubic root of 81062000 is about 432.7852373493.

Adding to 81062000 its reverse (26018), we get a palindrome (81088018).

The spelling of 81062000 in words is "eighty-one million, sixty-two thousand".