28505908810 has 16 divisors (see below), whose sum is σ = 54011196000. Its totient is φ = 10802239056.

The previous prime is 28505908807. The next prime is 28505908813. The reversal of 28505908810 is 1880950582.

It is an interprime number because it is at equal distance from previous prime (28505908807) and next prime (28505908813).

It is a super-2 number, since 2×28505908810² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28505908813) 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, 75015360 + ... + 75015739.

It is an arithmetic number, because the mean of its divisors is an integer number (3375699750).

Almost surely, 2^28505908810 is an apocalyptic number.

28505908810 is a deficient number, since it is larger than the sum of its proper divisors (25505287190).

28505908810 is a wasteful number, since it uses less digits than its factorization.

28505908810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150031125.

The product of its (nonzero) digits is 230400, while the sum is 46.

The spelling of 28505908810 in words is "twenty-eight billion, five hundred five million, nine hundred eight thousand, eight hundred ten".