30428012550 has 96 divisors (see below), whose sum is σ = 81906757632. Its totient is φ = 7430935680.

The previous prime is 30428012539. The next prime is 30428012569. The reversal of 30428012550 is 5521082403.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186217 + ... + 309083.

It is an arithmetic number, because the mean of its divisors is an integer number (853195392).

Almost surely, 2^30428012550 is an apocalyptic number.

30428012550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30428012550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40953378816).

30428012550 is an abundant number, since it is smaller than the sum of its proper divisors (51478745082).

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

30428012550 is a wasteful number, since it uses less digits than its factorization.

30428012550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123022 (or 123017 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 30428012550 its reverse (5521082403), we get a palindrome (35949094953).

The spelling of 30428012550 in words is "thirty billion, four hundred twenty-eight million, twelve thousand, five hundred fifty".