28393309830 has 32 divisors (see below), whose sum is σ = 68151331584. Its totient is φ = 7570728416.

The previous prime is 28393309811. The next prime is 28393309837. The reversal of 28393309830 is 3890339382.

It is a self number, because there is not a number n which added to its sum of digits gives 28393309830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28393309837) 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, 261229 + ... + 353591.

It is an arithmetic number, because the mean of its divisors is an integer number (2129729112).

Almost surely, 2^28393309830 is an apocalyptic number.

28393309830 is an abundant number, since it is smaller than the sum of its proper divisors (39758021754).

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

28393309830 is a wasteful number, since it uses less digits than its factorization.

28393309830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102620.

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 28393309830 in words is "twenty-eight billion, three hundred ninety-three million, three hundred nine thousand, eight hundred thirty".