30153820 has 24 divisors (see below), whose sum is σ = 64520064. Its totient is φ = 11833536.

The previous prime is 30153811. The next prime is 30153833. The reversal of 30153820 is 2835103.

30153820 is nontrivially palindromic in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 30153791 and 30153800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13164 + ... + 15283.

It is an arithmetic number, because the mean of its divisors is an integer number (2688336).

Almost surely, 2^30153820 is an apocalyptic number.

It is an amenable number.

30153820 is an abundant number, since it is smaller than the sum of its proper divisors (34366244).

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

30153820 is a wasteful number, since it uses less digits than its factorization.

30153820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28509 (or 28507 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30153820 is about 5491.2494024584. The cubic root of 30153820 is about 311.2534060906.

Adding to 30153820 its reverse (2835103), we get a palindrome (32988923).

The spelling of 30153820 in words is "thirty million, one hundred fifty-three thousand, eight hundred twenty".