30780200 has 96 divisors (see below), whose sum is σ = 82762560. Its totient is φ = 10521600.

The previous prime is 30780199. The next prime is 30780203. The reversal of 30780200 is 208703.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (30780203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36989 + ... + 37811.

It is an arithmetic number, because the mean of its divisors is an integer number (862110).

Almost surely, 2^30780200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30780200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41381280).

30780200 is an abundant number, since it is smaller than the sum of its proper divisors (51982360).

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

30780200 is a wasteful number, since it uses less digits than its factorization.

30780200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 30780200 is about 5547.9906272451. The cubic root of 30780200 is about 313.3938568262.

Adding to 30780200 its reverse (208703), we get a palindrome (30988903).

The spelling of 30780200 in words is "thirty million, seven hundred eighty thousand, two hundred".