30808900 has 36 divisors (see below), whose sum is σ = 68128452. Its totient is φ = 12088960.

The previous prime is 30808871. The next prime is 30808907. The reversal of 30808900 is 980803.

It can be written as a sum of positive squares in 6 ways, for example, as 161604 + 30647296 = 402^2 + 5536^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30808907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2394 + ... + 8206.

It is an arithmetic number, because the mean of its divisors is an integer number (1892457).

Almost surely, 2^30808900 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 30808900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34064226).

30808900 is an abundant number, since it is smaller than the sum of its proper divisors (37319552).

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

30808900 is a wasteful number, since it uses less digits than its factorization.

30808900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880 (or 5873 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 30808900 is about 5550.5765466301. The cubic root of 30808900 is about 313.4912312165.

The spelling of 30808900 in words is "thirty million, eight hundred eight thousand, nine hundred".