81798702 has 16 divisors (see below), whose sum is σ = 163788672. Its totient is φ = 27234360.

The previous prime is 81798701. The next prime is 81798709. The reversal of 81798702 is 20789718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81798701) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2074 + ... + 12957.

It is an arithmetic number, because the mean of its divisors is an integer number (10236792).

Almost surely, 2^81798702 is an apocalyptic number.

81798702 is an abundant number, since it is smaller than the sum of its proper divisors (81989970).

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

81798702 is a wasteful number, since it uses less digits than its factorization.

81798702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15943.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 81798702 is about 9044.2634857682. The cubic root of 81798702 is about 434.0923550685.

The spelling of 81798702 in words is "eighty-one million, seven hundred ninety-eight thousand, seven hundred two".