81960762 has 64 divisors (see below), whose sum is σ = 183214080. Its totient is φ = 24283584.

The previous prime is 81960733. The next prime is 81960773. The reversal of 81960762 is 26706918.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 81960762.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289473 + ... + 289755.

It is an arithmetic number, because the mean of its divisors is an integer number (2862720).

Almost surely, 2^81960762 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81960762, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91607040).

81960762 is an abundant number, since it is smaller than the sum of its proper divisors (101253318).

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

81960762 is a wasteful number, since it uses less digits than its factorization.

81960762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 81960762 is about 9053.2183227844. The cubic root of 81960762 is about 434.3788412751.

The spelling of 81960762 in words is "eighty-one million, nine hundred sixty thousand, seven hundred sixty-two".