81835708 has 12 divisors (see below), whose sum is σ = 146543320. Its totient is φ = 39966192.

The previous prime is 81835703. The next prime is 81835723. The reversal of 81835708 is 80753818.

It is a super-2 number, since 2×81835708² = 13394166207722528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81835703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237723 + ... + 238066.

Almost surely, 2^81835708 is an apocalyptic number.

It is an amenable number.

81835708 is a deficient number, since it is larger than the sum of its proper divisors (64707612).

81835708 is a wasteful number, since it uses less digits than its factorization.

81835708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475836 (or 475834 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 81835708 is about 9046.3090816089. The cubic root of 81835708 is about 434.1578067992.

The spelling of 81835708 in words is "eighty-one million, eight hundred thirty-five thousand, seven hundred eight".