81003768 has 32 divisors (see below), whose sum is σ = 203015760. Its totient is φ = 26933760.

The previous prime is 81003763. The next prime is 81003781. The reversal of 81003768 is 86730018.

It is a super-2 number, since 2×81003768² = 13123220860395648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81003761) 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, 6096 + ... + 14112.

Almost surely, 2^81003768 is an apocalyptic number.

It is an amenable number.

81003768 is an abundant number, since it is smaller than the sum of its proper divisors (122011992).

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

81003768 is a wasteful number, since it uses less digits than its factorization.

81003768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8447 (or 8443 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 81003768 is about 9000.2093308989. The cubic root of 81003768 is about 432.6815801195.

The spelling of 81003768 in words is "eighty-one million, three thousand, seven hundred sixty-eight".