28721611010 has 32 divisors (see below), whose sum is σ = 55107442800. Its totient is φ = 10740262912.

The previous prime is 28721611007. The next prime is 28721611019. The reversal of 28721611010 is 1011612782.

It can be written as a sum of positive squares in 8 ways, for example, as 8645838289 + 20075772721 = 92983^2 + 141689^2 .

It is not an unprimeable number, because it can be changed into a prime (28721611019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541619 + ... + 592278.

Almost surely, 2^28721611010 is an apocalyptic number.

28721611010 is a deficient number, since it is larger than the sum of its proper divisors (26385831790).

28721611010 is a wasteful number, since it uses less digits than its factorization.

28721611010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134070.

The product of its (nonzero) digits is 1344, while the sum is 29.

The spelling of 28721611010 in words is "twenty-eight billion, seven hundred twenty-one million, six hundred eleven thousand, ten".