28300272040 has 72 divisors (see below), whose sum is σ = 64803410910. Its totient is φ = 11123063424.

The previous prime is 28300272037. The next prime is 28300272047. The reversal of 28300272040 is 4027200382.

It can be written as a sum of positive squares in 3 ways, for example, as 25986084804 + 2314187236 = 161202^2 + 48106^2 .

It is not an unprimeable number, because it can be changed into a prime (28300272047) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 71285122 + ... + 71285518.

Almost surely, 2^28300272040 is an apocalyptic number.

28300272040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28300272040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32401705455).

28300272040 is an abundant number, since it is smaller than the sum of its proper divisors (36503138870).

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

28300272040 is an frugal number, since it uses more digits than its factorization.

28300272040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The spelling of 28300272040 in words is "twenty-eight billion, three hundred million, two hundred seventy-two thousand, forty".