28007750500 has 48 divisors (see below), whose sum is σ = 63278233200. Its totient is φ = 10816780800.

The previous prime is 28007750479. The next prime is 28007750501. The reversal of 28007750500 is 505770082.

It can be written as a sum of positive squares in 8 ways, for example, as 9751957504 + 18255792996 = 98752^2 + 135114^2 .

It is not an unprimeable number, because it can be changed into a prime (28007750501) 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, 951285 + ... + 980284.

It is an arithmetic number, because the mean of its divisors is an integer number (1318296525).

Almost surely, 2^28007750500 is an apocalyptic number.

28007750500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28007750500 is an abundant number, since it is smaller than the sum of its proper divisors (35270482700).

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

28007750500 is a wasteful number, since it uses less digits than its factorization.

28007750500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931617 (or 1931605 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The spelling of 28007750500 in words is "twenty-eight billion, seven million, seven hundred fifty thousand, five hundred".