81250284 has 24 divisors (see below), whose sum is σ = 190751680. Its totient is φ = 26916624.

The previous prime is 81250229. The next prime is 81250303. The reversal of 81250284 is 48205218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18814 + ... + 22725.

Almost surely, 2^81250284 is an apocalyptic number.

It is an amenable number.

81250284 is an abundant number, since it is smaller than the sum of its proper divisors (109501396).

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

81250284 is a wasteful number, since it uses less digits than its factorization.

81250284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41709 (or 41707 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 81250284 is about 9013.8939421318. The cubic root of 81250284 is about 433.1200573097.

The spelling of 81250284 in words is "eighty-one million, two hundred fifty thousand, two hundred eighty-four".