28309373480 has 32 divisors (see below), whose sum is σ = 63960411240. Its totient is φ = 11276759040.

The previous prime is 28309373473. The next prime is 28309373483. The reversal of 28309373480 is 8437390382.

It can be written as a sum of positive squares in 4 ways, for example, as 23519903044 + 4789470436 = 153362^2 + 69206^2 .

It is not an unprimeable number, because it can be changed into a prime (28309373483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458689 + ... + 1477968.

Almost surely, 2^28309373480 is an apocalyptic number.

28309373480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28309373480 is an abundant number, since it is smaller than the sum of its proper divisors (35651037760).

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

28309373480 is a wasteful number, since it uses less digits than its factorization.

28309373480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936909 (or 2936905 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 28309373480 in words is "twenty-eight billion, three hundred nine million, three hundred seventy-three thousand, four hundred eighty".