28727721610 has 32 divisors (see below), whose sum is σ = 61134860160. Its totient is φ = 9509865792.

The previous prime is 28727721601. The next prime is 28727721613. The reversal of 28727721610 is 1612772782.

It is not an unprimeable number, because it can be changed into a prime (28727721613) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7073764 + ... + 7077823.

It is an arithmetic number, because the mean of its divisors is an integer number (1910464380).

Almost surely, 2^28727721610 is an apocalyptic number.

28727721610 is an abundant number, since it is smaller than the sum of its proper divisors (32407138550).

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

28727721610 is a wasteful number, since it uses less digits than its factorization.

28727721610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14151630.

The product of its (nonzero) digits is 131712, while the sum is 43.

The spelling of 28727721610 in words is "twenty-eight billion, seven hundred twenty-seven million, seven hundred twenty-one thousand, six hundred ten".