30145860 has 72 divisors (see below), whose sum is σ = 91891800. Its totient is φ = 7999488.

The previous prime is 30145831. The next prime is 30145883. The reversal of 30145860 is 6854103.

It can be written as a sum of positive squares in 4 ways, for example, as 4562496 + 25583364 = 2136^2 + 5058^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66916 + ... + 67364.

It is an arithmetic number, because the mean of its divisors is an integer number (1276275).

Almost surely, 2^30145860 is an apocalyptic number.

30145860 is a gapful number since it is divisible by the number (30) 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 30145860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45945900).

30145860 is an abundant number, since it is smaller than the sum of its proper divisors (61745940).

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

30145860 is a wasteful number, since it uses less digits than its factorization.

30145860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 30145860 is about 5490.5245651030. The cubic root of 30145860 is about 311.2260154741.

Adding to 30145860 its reverse (6854103), we get a palindrome (36999963).

The spelling of 30145860 in words is "thirty million, one hundred forty-five thousand, eight hundred sixty".