28311009480 has 192 divisors, whose sum is σ = 99375035760. Its totient is φ = 6948716544.

The previous prime is 28311009443. The next prime is 28311009481. The reversal of 28311009480 is 8490011382.

It can be written as a sum of positive squares in 8 ways, for example, as 386594244 + 27924415236 = 19662^2 + 167106^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28311009481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1643472 + ... + 1660608.

Almost surely, 2^28311009480 is an apocalyptic number.

28311009480 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 28311009480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49687517880).

28311009480 is an abundant number, since it is smaller than the sum of its proper divisors (71064026280).

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

28311009480 is a wasteful number, since it uses less digits than its factorization.

28311009480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17520 (or 17513 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 28311009480 in words is "twenty-eight billion, three hundred eleven million, nine thousand, four hundred eighty".