28528054609 has 8 divisors (see below), whose sum is σ = 29513920320. Its totient is φ = 27542331600.

The previous prime is 28528054601. The next prime is 28528054613. The reversal of 28528054609 is 90645082582.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28528054609 - 2³ = 28528054601 is a prime.

It is a super-2 number, since 2×28528054609² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28528054601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515724 + ... + 568354.

It is an arithmetic number, because the mean of its divisors is an integer number (3689240040).

Almost surely, 2^28528054609 is an apocalyptic number.

28528054609 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28528054609 is a deficient number, since it is larger than the sum of its proper divisors (985865711).

28528054609 is a wasteful number, since it uses less digits than its factorization.

28528054609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71351.

The product of its (nonzero) digits is 1382400, while the sum is 49.

It can be divided in two parts, 285280 and 54609, that added together give a square (339889 = 583²).

The spelling of 28528054609 in words is "twenty-eight billion, five hundred twenty-eight million, fifty-four thousand, six hundred nine".