30800000 has 192 divisors, whose sum is σ = 95618880. Its totient is φ = 9600000.

The previous prime is 30799973. The next prime is 30800009. The reversal of 30800000 is 803.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is not an unprimeable number, because it can be changed into a prime (30800009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2799995 + ... + 2800005.

It is an arithmetic number, because the mean of its divisors is an integer number (498015).

Almost surely, 2^30800000 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 30800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47809440).

30800000 is an abundant number, since it is smaller than the sum of its proper divisors (64818880).

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

30800000 is an frugal number, since it uses more digits than its factorization.

30800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 30800000 is about 5549.7747702046. The cubic root of 30800000 is about 313.4610414481.

Adding to 30800000 its reverse (803), we get a palindrome (30800803).

The spelling of 30800000 in words is "thirty million, eight hundred thousand".