30550000 has 120 divisors (see below), whose sum is σ = 81369792. Its totient is φ = 11040000.

The previous prime is 30549979. The next prime is 30550007. The reversal of 30550000 is 5503.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30550007) 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, 649977 + ... + 650023.

Almost surely, 2^30550000 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 30550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40684896).

30550000 is an abundant number, since it is smaller than the sum of its proper divisors (50819792).

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

30550000 is an equidigital number, since it uses as much as digits as its factorization.

30550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 13.

The square root of 30550000 is about 5527.2054421742. The cubic root of 30550000 is about 312.6106274990.

Adding to 30550000 its reverse (5503), we get a palindrome (30555503).

It can be divided in two parts, 305 and 50000, that added together give a palindrome (50305).

The spelling of 30550000 in words is "thirty million, five hundred fifty thousand".