28720630486 has 8 divisors (see below), whose sum is σ = 43216848720. Its totient is φ = 14315014248.

The previous prime is 28720630483. The next prime is 28720630513. The reversal of 28720630486 is 68403602782.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28720630483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22649706 + ... + 22650973.

It is an arithmetic number, because the mean of its divisors is an integer number (5402106090).

Almost surely, 2^28720630486 is an apocalyptic number.

28720630486 is a deficient number, since it is larger than the sum of its proper divisors (14496218234).

28720630486 is a wasteful number, since it uses less digits than its factorization.

28720630486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45300998.

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 28720630486 in words is "twenty-eight billion, seven hundred twenty million, six hundred thirty thousand, four hundred eighty-six".