28345909830 has 32 divisors (see below), whose sum is σ = 77748781824. Its totient is φ = 6479065056.

The previous prime is 28345909793. The next prime is 28345909861. The reversal of 28345909830 is 3890954382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67490052 + ... + 67490471.

It is an arithmetic number, because the mean of its divisors is an integer number (2429649432).

Almost surely, 2^28345909830 is an apocalyptic number.

28345909830 is an abundant number, since it is smaller than the sum of its proper divisors (49402871994).

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

28345909830 is a wasteful number, since it uses less digits than its factorization.

28345909830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134980540.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 28345909830 in words is "twenty-eight billion, three hundred forty-five million, nine hundred nine thousand, eight hundred thirty".