81202608 has 80 divisors (see below), whose sum is σ = 246814560. Its totient is φ = 25473024.

The previous prime is 81202607. The next prime is 81202613. The reversal of 81202608 is 80620218.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (81202601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1816 + ... + 12872.

It is an arithmetic number, because the mean of its divisors is an integer number (3085182).

Almost surely, 2^81202608 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 81202608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123407280).

81202608 is an abundant number, since it is smaller than the sum of its proper divisors (165611952).

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

81202608 is a wasteful number, since it uses less digits than its factorization.

81202608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11091 (or 11079 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 81202608 is about 9011.2489700374. The cubic root of 81202608 is about 433.0353254128.

It can be divided in two parts, 81202 and 608, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 81202608 in words is "eighty-one million, two hundred two thousand, six hundred eight".