81850308 has 48 divisors (see below), whose sum is σ = 202857984. Its totient is φ = 25597440.

The previous prime is 81850297. The next prime is 81850313. The reversal of 81850308 is 80305818.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123498 + ... + 124158.

It is an arithmetic number, because the mean of its divisors is an integer number (4226208).

Almost surely, 2^81850308 is an apocalyptic number.

It is an amenable number.

81850308 is an abundant number, since it is smaller than the sum of its proper divisors (121007676).

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

81850308 is a wasteful number, since it uses less digits than its factorization.

81850308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 81850308 is about 9047.1160045619. The cubic root of 81850308 is about 434.1836240828.

The spelling of 81850308 in words is "eighty-one million, eight hundred fifty thousand, three hundred eight".