30904000 has 56 divisors (see below), whose sum is σ = 76553568. Its totient is φ = 12358400.

The previous prime is 30903989. The next prime is 30904001. The reversal of 30904000 is 40903.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (30904001) 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 7 ways as a sum of consecutive naturals, for example, 6069 + ... + 9931.

It is an arithmetic number, because the mean of its divisors is an integer number (1367028).

Almost surely, 2^30904000 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 30904000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38276784).

30904000 is an abundant number, since it is smaller than the sum of its proper divisors (45649568).

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

30904000 is an equidigital number, since it uses as much as digits as its factorization.

30904000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890 (or 3870 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 30904000 is about 5559.1366236134. The cubic root of 30904000 is about 313.8134583789.

Adding to 30904000 its reverse (40903), we get a palindrome (30944903).

The spelling of 30904000 in words is "thirty million, nine hundred four thousand".