81848120 has 16 divisors (see below), whose sum is σ = 184158360. Its totient is φ = 32739232.

The previous prime is 81848119. The next prime is 81848131. The reversal of 81848120 is 2184818.

It is a super-2 number, since 2×81848120² = 13398229495068800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023062 + ... + 1023141.

Almost surely, 2^81848120 is an apocalyptic number.

It is an amenable number.

81848120 is an abundant number, since it is smaller than the sum of its proper divisors (102310240).

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

81848120 is a wasteful number, since it uses less digits than its factorization.

81848120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046214 (or 2046210 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 81848120 is about 9046.9950812411. The cubic root of 81848120 is about 434.1797552225.

The spelling of 81848120 in words is "eighty-one million, eight hundred forty-eight thousand, one hundred twenty".