81736396 has 12 divisors (see below), whose sum is σ = 163472848. Its totient is φ = 35029872.

The previous prime is 81736387. The next prime is 81736433. The reversal of 81736396 is 69363718.

81736396 is an admirable number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1459551 + ... + 1459606.

Almost surely, 2^81736396 is an apocalyptic number.

It is an amenable number.

81736396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81736396 is a wasteful number, since it uses less digits than its factorization.

81736396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2919168 (or 2919166 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 81736396 is about 9040.8183257933. The cubic root of 81736396 is about 433.9821111501.

The spelling of 81736396 in words is "eighty-one million, seven hundred thirty-six thousand, three hundred ninety-six".