28291711104 has 80 divisors (see below), whose sum is σ = 84195704670. Its totient is φ = 9430566912.

The previous prime is 28291711099. The next prime is 28291711111. The reversal of 28291711104 is 40111719282.

It can be written as a sum of positive squares in only one way, i.e., 27638397504 + 653313600 = 166248^2 + 25560^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1354009 + ... + 1374744.

Almost surely, 2^28291711104 is an apocalyptic number.

28291711104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28291711104 is an abundant number, since it is smaller than the sum of its proper divisors (55903993566).

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

28291711104 is an equidigital number, since it uses as much as digits as its factorization.

28291711104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728779 (or 2728758 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 28291711104 in words is "twenty-eight billion, two hundred ninety-one million, seven hundred eleven thousand, one hundred four".