81824630 has 8 divisors (see below), whose sum is σ = 147284352. Its totient is φ = 32729848.

The previous prime is 81824629. The next prime is 81824651. The reversal of 81824630 is 3642818.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 4091222 + ... + 4091241.

It is an arithmetic number, because the mean of its divisors is an integer number (18410544).

Almost surely, 2^81824630 is an apocalyptic number.

81824630 is a deficient number, since it is larger than the sum of its proper divisors (65459722).

81824630 is a wasteful number, since it uses less digits than its factorization.

81824630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8182470.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 81824630 is about 9045.6967669716. The cubic root of 81824630 is about 434.1382154441.

The spelling of 81824630 in words is "eighty-one million, eight hundred twenty-four thousand, six hundred thirty".