81827960 has 16 divisors (see below), whose sum is σ = 184113000. Its totient is φ = 32731168.

The previous prime is 81827959. The next prime is 81827983. The reversal of 81827960 is 6972818.

It is a congruent number.

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, 1022810 + ... + 1022889.

Almost surely, 2^81827960 is an apocalyptic number.

It is an amenable number.

81827960 is an abundant number, since it is smaller than the sum of its proper divisors (102285040).

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

81827960 is a wasteful number, since it uses less digits than its factorization.

81827960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045710 (or 2045706 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 81827960 is about 9045.8808305217. The cubic root of 81827960 is about 434.1441047086.

The spelling of 81827960 in words is "eighty-one million, eight hundred twenty-seven thousand, nine hundred sixty".