81062460 has 144 divisors (see below), whose sum is σ = 265356000. Its totient is φ = 19955712.

The previous prime is 81062441. The next prime is 81062491. The reversal of 81062460 is 6426018.

It is a super-2 number, since 2×81062460² = 13142244842503200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180316 + ... + 180764.

It is an arithmetic number, because the mean of its divisors is an integer number (1842750).

Almost surely, 2^81062460 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 81062460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132678000).

81062460 is an abundant number, since it is smaller than the sum of its proper divisors (184293540).

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

81062460 is a wasteful number, since it uses less digits than its factorization.

81062460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 81062460 is about 9003.4693313189. The cubic root of 81062460 is about 432.7860559853.

Adding to 81062460 its reverse (6426018), we get a palindrome (87488478).

The spelling of 81062460 in words is "eighty-one million, sixty-two thousand, four hundred sixty".