30860028 has 84 divisors (see below), whose sum is σ = 85385160. Its totient is φ = 9727776.

The previous prime is 30860023. The next prime is 30860029. The reversal of 30860028 is 82006803.

30860028 is a `hidden beast` number, since 30 + 8 + 600 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 30859983 and 30860010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30860023) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 55126 + ... + 55682.

It is an arithmetic number, because the mean of its divisors is an integer number (1016490).

Almost surely, 2^30860028 is an apocalyptic number.

30860028 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30860028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42692580).

30860028 is an abundant number, since it is smaller than the sum of its proper divisors (54525132).

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

30860028 is a wasteful number, since it uses less digits than its factorization.

30860028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 30860028 is about 5555.1802851033. The cubic root of 30860028 is about 313.6645504140.

The spelling of 30860028 in words is "thirty million, eight hundred sixty thousand, twenty-eight".