28488021289 has 32 divisors (see below), whose sum is σ = 35964879104. Its totient is φ = 21962223360.

The previous prime is 28488021209. The next prime is 28488021313. The reversal of 28488021289 is 98212088482.

It is not a de Polignac number, because 28488021289 - 2¹³ = 28488013097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28488021209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1638727 + ... + 1656019.

It is an arithmetic number, because the mean of its divisors is an integer number (1123902472).

Almost surely, 2^28488021289 is an apocalyptic number.

It is an amenable number.

28488021289 is a deficient number, since it is larger than the sum of its proper divisors (7476857815).

28488021289 is a wasteful number, since it uses less digits than its factorization.

28488021289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17777.

The product of its (nonzero) digits is 1179648, while the sum is 52.

The spelling of 28488021289 in words is "twenty-eight billion, four hundred eighty-eight million, twenty-one thousand, two hundred eighty-nine".