81753888 has 24 divisors (see below), whose sum is σ = 214604208. Its totient is φ = 27251264.

The previous prime is 81753863. The next prime is 81753911. The reversal of 81753888 is 88835718.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 425706 + ... + 425897.

It is an arithmetic number, because the mean of its divisors is an integer number (8941842).

Almost surely, 2^81753888 is an apocalyptic number.

It is an amenable number.

81753888 is an abundant number, since it is smaller than the sum of its proper divisors (132850320).

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

81753888 is a wasteful number, since it uses less digits than its factorization.

81753888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851616 (or 851608 counting only the distinct ones).

The product of its digits is 430080, while the sum is 48.

The square root of 81753888 is about 9041.7856643475. The cubic root of 81753888 is about 434.0130670604.

The spelling of 81753888 in words is "eighty-one million, seven hundred fifty-three thousand, eight hundred eighty-eight".