28019603430 has 648 divisors, whose sum is σ = 98804742192. Its totient is φ = 5600679552.

The previous prime is 28019603429. The next prime is 28019603453. The reversal of 28019603430 is 3430691082.

28019603430 is a `hidden beast` number, since 2 + 8 + 0 + 1 + 9 + 603 + 43 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 1474715961 + ... + 1474715979.

It is an arithmetic number, because the mean of its divisors is an integer number (152476454).

Almost surely, 2^28019603430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28019603430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49402371096).

28019603430 is an abundant number, since it is smaller than the sum of its proper divisors (70785138762).

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

28019603430 is an equidigital number, since it uses as much as digits as its factorization.

28019603430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 28019603430 in words is "twenty-eight billion, nineteen million, six hundred three thousand, four hundred thirty".